Finding the Third Proportional to 31,811,276,763.75 and 69,207,664,221.38

Step by Step Solution

1. Step 1: Write the proportion equation
   31,811,276,763.75 : 69,207,664,221.38 = 69,207,664,221.38 : x
2. Step 2: Convert to fraction form
   31,811,276,763.75/69,207,664,221.38 = 69,207,664,221.38/x
3. Step 3: Cross multiply
   31,811,276,763.75x = 69,207,664,221.38 × 69,207,664,221.38
4. Step 4: Simplify right side
   31,811,276,763.75x = 4,789,700,786,978,589,507,584
5. Step 5: Solve for x
   x = 4,789,700,786,978,589,507,584/31,811,276,763.75
6. Step 6: Final answer
   x = 150,566,128,563.46