Finding the Third Proportional to 31,900,642 and 69,977,316

Step by Step Solution

1. Step 1: Write the proportion equation
   31,900,642 : 69,977,316 = 69,977,316 : x
2. Step 2: Convert to fraction form
   31,900,642/69,977,316 = 69,977,316/x
3. Step 3: Cross multiply
   31,900,642x = 69,977,316 × 69,977,316
4. Step 4: Simplify right side
   31,900,642x = 4,896,824,754,563,856
5. Step 5: Solve for x
   x = 4,896,824,754,563,856/31,900,642
6. Step 6: Final answer
   x = 153,502,388.90