Finding the Third Proportional to 122,089.50 and 261,700.31

Step by Step Solution

1. Step 1: Write the proportion equation
   122,089.50 : 261,700.31 = 261,700.31 : x
2. Step 2: Convert to fraction form
   122,089.50/261,700.31 = 261,700.31/x
3. Step 3: Cross multiply
   122,089.50x = 261,700.31 × 261,700.31
4. Step 4: Simplify right side
   122,089.50x = 68,487,053,562.60
5. Step 5: Solve for x
   x = 68,487,053,562.60/122,089.50
6. Step 6: Final answer
   x = 560,957.77