Finding the Fourth Proportional to 1,043.16, 1,562.58 and 521.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.16 : 1,562.58 = 521.52 : x
2. Step 2: Convert to fraction form
   1,043.16/1,562.58 = 521.52/x
3. Step 3: Cross multiply
   1,043.16x = 1,562.58 × 521.52
4. Step 4: Simplify right side
   1,043.16x = 814,916.72
5. Step 5: Solve for x
   x = 814,916.72/1,043.16
6. Step 6: Final answer
   x = 781.20