Finding the Fourth Proportional to 1,158.09, 1,598.16 and 634.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.09 : 1,598.16 = 634.15 : x
2. Step 2: Convert to fraction form
   1,158.09/1,598.16 = 634.15/x
3. Step 3: Cross multiply
   1,158.09x = 1,598.16 × 634.15
4. Step 4: Simplify right side
   1,158.09x = 1,013,473.16
5. Step 5: Solve for x
   x = 1,013,473.16/1,158.09
6. Step 6: Final answer
   x = 875.12