Finding the Fourth Proportional to 10,143.31, 15,200.38 and 4,291.87

Step by Step Solution

1. Step 1: Write the proportion equation
   10,143.31 : 15,200.38 = 4,291.87 : x
2. Step 2: Convert to fraction form
   10,143.31/15,200.38 = 4,291.87/x
3. Step 3: Cross multiply
   10,143.31x = 15,200.38 × 4,291.87
4. Step 4: Simplify right side
   10,143.31x = 65,238,054.91
5. Step 5: Solve for x
   x = 65,238,054.91/10,143.31
6. Step 6: Final answer
   x = 6,431.63