Finding the Fourth Proportional to 1,158.59, 1,598.85 and 634.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.59 : 1,598.85 = 634.61 : x
2. Step 2: Convert to fraction form
   1,158.59/1,598.85 = 634.61/x
3. Step 3: Cross multiply
   1,158.59x = 1,598.85 × 634.61
4. Step 4: Simplify right side
   1,158.59x = 1,014,638.20
5. Step 5: Solve for x
   x = 1,014,638.20/1,158.59
6. Step 6: Final answer
   x = 875.76