Finding the Third Proportional to 123,411,174 and 256,388,222

Step by Step Solution

1. Step 1: Write the proportion equation
   123,411,174 : 256,388,222 = 256,388,222 : x
2. Step 2: Convert to fraction form
   123,411,174/256,388,222 = 256,388,222/x
3. Step 3: Cross multiply
   123,411,174x = 256,388,222 × 256,388,222
4. Step 4: Simplify right side
   123,411,174x = 65,734,920,380,321,280
5. Step 5: Solve for x
   x = 65,734,920,380,321,280/123,411,174
6. Step 6: Final answer
   x = 532,649,664.12