Finding the Fourth Proportional to 7,715.86, 10,632.47 and 5,353.90

Step by Step Solution

1. Step 1: Write the proportion equation
   7,715.86 : 10,632.47 = 5,353.90 : x
2. Step 2: Convert to fraction form
   7,715.86/10,632.47 = 5,353.90/x
3. Step 3: Cross multiply
   7,715.86x = 10,632.47 × 5,353.90
4. Step 4: Simplify right side
   7,715.86x = 56,925,127.78
5. Step 5: Solve for x
   x = 56,925,127.78/7,715.86
6. Step 6: Final answer
   x = 7,377.68