Finding the Fourth Proportional to 1,150.71, 1,587.51 and 801.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.71 : 1,587.51 = 801.60 : x
2. Step 2: Convert to fraction form
   1,150.71/1,587.51 = 801.60/x
3. Step 3: Cross multiply
   1,150.71x = 1,587.51 × 801.60
4. Step 4: Simplify right side
   1,150.71x = 1,272,548.02
5. Step 5: Solve for x
   x = 1,272,548.02/1,150.71
6. Step 6: Final answer
   x = 1,105.88