Finding the Fourth Proportional to 1,134.87, 1,566.71 and 715.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,134.87 : 1,566.71 = 715.83 : x
2. Step 2: Convert to fraction form
   1,134.87/1,566.71 = 715.83/x
3. Step 3: Cross multiply
   1,134.87x = 1,566.71 × 715.83
4. Step 4: Simplify right side
   1,134.87x = 1,121,498.02
5. Step 5: Solve for x
   x = 1,121,498.02/1,134.87
6. Step 6: Final answer
   x = 988.22