Finding the Fourth Proportional to 9,158.67, 12,637.17 and 5,178.33

Step by Step Solution

1. Step 1: Write the proportion equation
   9,158.67 : 12,637.17 = 5,178.33 : x
2. Step 2: Convert to fraction form
   9,158.67/12,637.17 = 5,178.33/x
3. Step 3: Cross multiply
   9,158.67x = 12,637.17 × 5,178.33
4. Step 4: Simplify right side
   9,158.67x = 65,439,436.53
5. Step 5: Solve for x
   x = 65,439,436.53/9,158.67
6. Step 6: Final answer
   x = 7,145.08