Finding the Fourth Proportional to 1,008.59, 1,505.82 and 862.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.59 : 1,505.82 = 862.41 : x
2. Step 2: Convert to fraction form
   1,008.59/1,505.82 = 862.41/x
3. Step 3: Cross multiply
   1,008.59x = 1,505.82 × 862.41
4. Step 4: Simplify right side
   1,008.59x = 1,298,643.11
5. Step 5: Solve for x
   x = 1,298,643.11/1,008.59
6. Step 6: Final answer
   x = 1,287.59