Finding the Fourth Proportional to 1,158.21, 1,598.31 and 634.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.21 : 1,598.31 = 634.23 : x
2. Step 2: Convert to fraction form
   1,158.21/1,598.31 = 634.23/x
3. Step 3: Cross multiply
   1,158.21x = 1,598.31 × 634.23
4. Step 4: Simplify right side
   1,158.21x = 1,013,696.15
5. Step 5: Solve for x
   x = 1,013,696.15/1,158.21
6. Step 6: Final answer
   x = 875.23