Finding the Fourth Proportional to 1,158.15, 1,736.06 and 747.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.15 : 1,736.06 = 747.57 : x
2. Step 2: Convert to fraction form
   1,158.15/1,736.06 = 747.57/x
3. Step 3: Cross multiply
   1,158.15x = 1,736.06 × 747.57
4. Step 4: Simplify right side
   1,158.15x = 1,297,826.37
5. Step 5: Solve for x
   x = 1,297,826.37/1,158.15
6. Step 6: Final answer
   x = 1,120.60