Finding the Fourth Proportional to 10,086.50, 15,131.88 and 4,239.74

Step by Step Solution

1. Step 1: Write the proportion equation
   10,086.50 : 15,131.88 = 4,239.74 : x
2. Step 2: Convert to fraction form
   10,086.50/15,131.88 = 4,239.74/x
3. Step 3: Cross multiply
   10,086.50x = 15,131.88 × 4,239.74
4. Step 4: Simplify right side
   10,086.50x = 64,155,236.91
5. Step 5: Solve for x
   x = 64,155,236.91/10,086.50
6. Step 6: Final answer
   x = 6,360.51