Finding the Third Proportional to 240,139.50 and 517,521

Step by Step Solution

1. Step 1: Write the proportion equation
   240,139.50 : 517,521 = 517,521 : x
2. Step 2: Convert to fraction form
   240,139.50/517,521 = 517,521/x
3. Step 3: Cross multiply
   240,139.50x = 517,521 × 517,521
4. Step 4: Simplify right side
   240,139.50x = 267,827,985,441
5. Step 5: Solve for x
   x = 267,827,985,441/240,139.50
6. Step 6: Final answer
   x = 1,115,301.67