Finding the Fourth Proportional to 9,781.92, 13,499.28 and 5,590.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,781.92 : 13,499.28 = 5,590.56 : x
2. Step 2: Convert to fraction form
   9,781.92/13,499.28 = 5,590.56/x
3. Step 3: Cross multiply
   9,781.92x = 13,499.28 × 5,590.56
4. Step 4: Simplify right side
   9,781.92x = 75,468,534.80
5. Step 5: Solve for x
   x = 75,468,534.80/9,781.92
6. Step 6: Final answer
   x = 7,715.10