Finding the Third Proportional to 189,598,921 and 406,071,662

Step by Step Solution

1. Step 1: Write the proportion equation
   189,598,921 : 406,071,662 = 406,071,662 : x
2. Step 2: Convert to fraction form
   189,598,921/406,071,662 = 406,071,662/x
3. Step 3: Cross multiply
   189,598,921x = 406,071,662 × 406,071,662
4. Step 4: Simplify right side
   189,598,921x = 164,894,194,679,442,240
5. Step 5: Solve for x
   x = 164,894,194,679,442,240/189,598,921
6. Step 6: Final answer
   x = 869,700,069.02