Finding the Fourth Proportional to 9,128.72, 13,695.30 and 5,383.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.72 : 13,695.30 = 5,383.62 : x
2. Step 2: Convert to fraction form
   9,128.72/13,695.30 = 5,383.62/x
3. Step 3: Cross multiply
   9,128.72x = 13,695.30 × 5,383.62
4. Step 4: Simplify right side
   9,128.72x = 73,730,290.99
5. Step 5: Solve for x
   x = 73,730,290.99/9,128.72
6. Step 6: Final answer
   x = 8,076.74