Finding the Fourth Proportional to 1,158.72, 1,599.06 and 634.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.72 : 1,599.06 = 634.76 : x
2. Step 2: Convert to fraction form
   1,158.72/1,599.06 = 634.76/x
3. Step 3: Cross multiply
   1,158.72x = 1,599.06 × 634.76
4. Step 4: Simplify right side
   1,158.72x = 1,015,019.33
5. Step 5: Solve for x
   x = 1,015,019.33/1,158.72
6. Step 6: Final answer
   x = 875.98