Finding the Fourth Proportional to 1,142.47, 1,711.42 and 525.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.47 : 1,711.42 = 525.33 : x
2. Step 2: Convert to fraction form
   1,142.47/1,711.42 = 525.33/x
3. Step 3: Cross multiply
   1,142.47x = 1,711.42 × 525.33
4. Step 4: Simplify right side
   1,142.47x = 899,060.27
5. Step 5: Solve for x
   x = 899,060.27/1,142.47
6. Step 6: Final answer
   x = 786.94