Finding the Third Proportional to 31,191,874 and 69,555,771

Step by Step Solution

1. Step 1: Write the proportion equation
   31,191,874 : 69,555,771 = 69,555,771 : x
2. Step 2: Convert to fraction form
   31,191,874/69,555,771 = 69,555,771/x
3. Step 3: Cross multiply
   31,191,874x = 69,555,771 × 69,555,771
4. Step 4: Simplify right side
   31,191,874x = 4,838,005,279,404,441
5. Step 5: Solve for x
   x = 4,838,005,279,404,441/31,191,874
6. Step 6: Final answer
   x = 155,104,668.59