Finding the Fourth Proportional to 1,158.54, 1,598.78 and 634.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.54 : 1,598.78 = 634.57 : x
2. Step 2: Convert to fraction form
   1,158.54/1,598.78 = 634.57/x
3. Step 3: Cross multiply
   1,158.54x = 1,598.78 × 634.57
4. Step 4: Simplify right side
   1,158.54x = 1,014,537.82
5. Step 5: Solve for x
   x = 1,014,537.82/1,158.54
6. Step 6: Final answer
   x = 875.70