Finding the Fourth Proportional to 12,038.31, 18,059.27 and 4,142.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,038.31 : 18,059.27 = 4,142.87 : x
2. Step 2: Convert to fraction form
   12,038.31/18,059.27 = 4,142.87/x
3. Step 3: Cross multiply
   12,038.31x = 18,059.27 × 4,142.87
4. Step 4: Simplify right side
   12,038.31x = 74,817,096.89
5. Step 5: Solve for x
   x = 74,817,096.89/12,038.31
6. Step 6: Final answer
   x = 6,214.92