Finding the Third Proportional to 31,597.88 and 69,129.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,597.88 : 69,129.88 = 69,129.88 : x
2. Step 2: Convert to fraction form
   31,597.88/69,129.88 = 69,129.88/x
3. Step 3: Cross multiply
   31,597.88x = 69,129.88 × 69,129.88
4. Step 4: Simplify right side
   31,597.88x = 4,778,939,617.52
5. Step 5: Solve for x
   x = 4,778,939,617.52/31,597.88
6. Step 6: Final answer
   x = 151,242.44