Finding the Fourth Proportional to 1,142.52, 1,710.40 and 869.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.52 : 1,710.40 = 869.68 : x
2. Step 2: Convert to fraction form
   1,142.52/1,710.40 = 869.68/x
3. Step 3: Cross multiply
   1,142.52x = 1,710.40 × 869.68
4. Step 4: Simplify right side
   1,142.52x = 1,487,500.67
5. Step 5: Solve for x
   x = 1,487,500.67/1,142.52
6. Step 6: Final answer
   x = 1,301.95