Finding the Fourth Proportional to 7,715.28, 10,648.89 and 5,477.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,715.28 : 10,648.89 = 5,477.86 : x
2. Step 2: Convert to fraction form
   7,715.28/10,648.89 = 5,477.86/x
3. Step 3: Cross multiply
   7,715.28x = 10,648.89 × 5,477.86
4. Step 4: Simplify right side
   7,715.28x = 58,333,101.95
5. Step 5: Solve for x
   x = 58,333,101.95/7,715.28
6. Step 6: Final answer
   x = 7,560.72