Finding the Fourth Proportional to 10,112.91, 15,176.20 and 3,539.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,112.91 : 15,176.20 = 3,539.15 : x
2. Step 2: Convert to fraction form
   10,112.91/15,176.20 = 3,539.15/x
3. Step 3: Cross multiply
   10,112.91x = 15,176.20 × 3,539.15
4. Step 4: Simplify right side
   10,112.91x = 53,710,830.53
5. Step 5: Solve for x
   x = 53,710,830.53/10,112.91
6. Step 6: Final answer
   x = 5,311.12