Finding the Fourth Proportional to 1,316.55, 1,815.57 and 1,017.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,316.55 : 1,815.57 = 1,017.32 : x
2. Step 2: Convert to fraction form
   1,316.55/1,815.57 = 1,017.32/x
3. Step 3: Cross multiply
   1,316.55x = 1,815.57 × 1,017.32
4. Step 4: Simplify right side
   1,316.55x = 1,847,008.59
5. Step 5: Solve for x
   x = 1,847,008.59/1,316.55
6. Step 6: Final answer
   x = 1,402.92