Finding the Fourth Proportional to 10,920.86, 16,375.53 and 4,761.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,920.86 : 16,375.53 = 4,761.50 : x
2. Step 2: Convert to fraction form
   10,920.86/16,375.53 = 4,761.50/x
3. Step 3: Cross multiply
   10,920.86x = 16,375.53 × 4,761.50
4. Step 4: Simplify right side
   10,920.86x = 77,972,086.10
5. Step 5: Solve for x
   x = 77,972,086.10/10,920.86
6. Step 6: Final answer
   x = 7,139.74