Finding the Third Proportional to 123,411,156 and 256,388,185.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,411,156 : 256,388,185.50 = 256,388,185.50 : x
2. Step 2: Convert to fraction form
   123,411,156/256,388,185.50 = 256,388,185.50/x
3. Step 3: Cross multiply
   123,411,156x = 256,388,185.50 × 256,388,185.50
4. Step 4: Simplify right side
   123,411,156x = 65,734,901,663,982,408
5. Step 5: Solve for x
   x = 65,734,901,663,982,408/123,411,156
6. Step 6: Final answer
   x = 532,649,590.16