Finding the Third Proportional to 31,900,554 and 69,977,142

Step by Step Solution

1. Step 1: Write the proportion equation
   31,900,554 : 69,977,142 = 69,977,142 : x
2. Step 2: Convert to fraction form
   31,900,554/69,977,142 = 69,977,142/x
3. Step 3: Cross multiply
   31,900,554x = 69,977,142 × 69,977,142
4. Step 4: Simplify right side
   31,900,554x = 4,896,800,402,488,164
5. Step 5: Solve for x
   x = 4,896,800,402,488,164/31,900,554
6. Step 6: Final answer
   x = 153,502,048.98