Finding the Third Proportional to 260,329.50 and 402,292

Step by Step Solution

1. Step 1: Write the proportion equation
   260,329.50 : 402,292 = 402,292 : x
2. Step 2: Convert to fraction form
   260,329.50/402,292 = 402,292/x
3. Step 3: Cross multiply
   260,329.50x = 402,292 × 402,292
4. Step 4: Simplify right side
   260,329.50x = 161,838,853,264
5. Step 5: Solve for x
   x = 161,838,853,264/260,329.50
6. Step 6: Final answer
   x = 621,669.28