Finding the Third Proportional to 31,191,788 and 69,555,550

Step by Step Solution

1. Step 1: Write the proportion equation
   31,191,788 : 69,555,550 = 69,555,550 : x
2. Step 2: Convert to fraction form
   31,191,788/69,555,550 = 69,555,550/x
3. Step 3: Cross multiply
   31,191,788x = 69,555,550 × 69,555,550
4. Step 4: Simplify right side
   31,191,788x = 4,837,974,535,802,500
5. Step 5: Solve for x
   x = 4,837,974,535,802,500/31,191,788
6. Step 6: Final answer
   x = 155,104,110.60