Finding the Fourth Proportional to 1,061.15, 1,591.80 and 599.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.15 : 1,591.80 = 599.15 : x
2. Step 2: Convert to fraction form
   1,061.15/1,591.80 = 599.15/x
3. Step 3: Cross multiply
   1,061.15x = 1,591.80 × 599.15
4. Step 4: Simplify right side
   1,061.15x = 953,723.12
5. Step 5: Solve for x
   x = 953,723.12/1,061.15
6. Step 6: Final answer
   x = 898.76