Finding the Fourth Proportional to 1,013.31, 1,517.54 and 526.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.31 : 1,517.54 = 526.10 : x
2. Step 2: Convert to fraction form
   1,013.31/1,517.54 = 526.10/x
3. Step 3: Cross multiply
   1,013.31x = 1,517.54 × 526.10
4. Step 4: Simplify right side
   1,013.31x = 798,367.58
5. Step 5: Solve for x
   x = 798,367.58/1,013.31
6. Step 6: Final answer
   x = 787.88