Finding the Third Proportional to 123,411,171 and 256,388,215.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,411,171 : 256,388,215.50 = 256,388,215.50 : x
2. Step 2: Convert to fraction form
   123,411,171/256,388,215.50 = 256,388,215.50/x
3. Step 3: Cross multiply
   123,411,171x = 256,388,215.50 × 256,388,215.50
4. Step 4: Simplify right side
   123,411,171x = 65,734,917,047,274,440
5. Step 5: Solve for x
   x = 65,734,917,047,274,440/123,411,171
6. Step 6: Final answer
   x = 532,649,650.07