Finding the Fourth Proportional to 1,158.55, 1,598.80 and 634.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.55 : 1,598.80 = 634.58 : x
2. Step 2: Convert to fraction form
   1,158.55/1,598.80 = 634.58/x
3. Step 3: Cross multiply
   1,158.55x = 1,598.80 × 634.58
4. Step 4: Simplify right side
   1,158.55x = 1,014,563.33
5. Step 5: Solve for x
   x = 1,014,563.33/1,158.55
6. Step 6: Final answer
   x = 875.72