Finding the Third Proportional to 121,761.50 and 266,435

Step by Step Solution

1. Step 1: Write the proportion equation
   121,761.50 : 266,435 = 266,435 : x
2. Step 2: Convert to fraction form
   121,761.50/266,435 = 266,435/x
3. Step 3: Cross multiply
   121,761.50x = 266,435 × 266,435
4. Step 4: Simplify right side
   121,761.50x = 70,987,609,225
5. Step 5: Solve for x
   x = 70,987,609,225/121,761.50
6. Step 6: Final answer
   x = 583,005.38