Finding the Fourth Proportional to 10,090.86, 15,138.72 and 3,517.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,090.86 : 15,138.72 = 3,517.31 : x
2. Step 2: Convert to fraction form
   10,090.86/15,138.72 = 3,517.31/x
3. Step 3: Cross multiply
   10,090.86x = 15,138.72 × 3,517.31
4. Step 4: Simplify right side
   10,090.86x = 53,247,495.55
5. Step 5: Solve for x
   x = 53,247,495.55/10,090.86
6. Step 6: Final answer
   x = 5,276.80