Finding the Fourth Proportional to 9,376.72, 12,939.96 and 5,185.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,376.72 : 12,939.96 = 5,185.04 : x
2. Step 2: Convert to fraction form
   9,376.72/12,939.96 = 5,185.04/x
3. Step 3: Cross multiply
   9,376.72x = 12,939.96 × 5,185.04
4. Step 4: Simplify right side
   9,376.72x = 67,094,210.20
5. Step 5: Solve for x
   x = 67,094,210.20/9,376.72
6. Step 6: Final answer
   x = 7,155.40