Finding the Fourth Proportional to 1,141.29, 1,711.71 and 525.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.29 : 1,711.71 = 525.15 : x
2. Step 2: Convert to fraction form
   1,141.29/1,711.71 = 525.15/x
3. Step 3: Cross multiply
   1,141.29x = 1,711.71 × 525.15
4. Step 4: Simplify right side
   1,141.29x = 898,904.51
5. Step 5: Solve for x
   x = 898,904.51/1,141.29
6. Step 6: Final answer
   x = 787.62