Finding the Third Proportional to 121,755.50 and 266,423

Step by Step Solution

1. Step 1: Write the proportion equation
   121,755.50 : 266,423 = 266,423 : x
2. Step 2: Convert to fraction form
   121,755.50/266,423 = 266,423/x
3. Step 3: Cross multiply
   121,755.50x = 266,423 × 266,423
4. Step 4: Simplify right side
   121,755.50x = 70,981,214,929
5. Step 5: Solve for x
   x = 70,981,214,929/121,755.50
6. Step 6: Final answer
   x = 582,981.59