Finding the Fourth Proportional to 3,817.61, 5,752.42 and 3,139.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,817.61 : 5,752.42 = 3,139.47 : x
2. Step 2: Convert to fraction form
   3,817.61/5,752.42 = 3,139.47/x
3. Step 3: Cross multiply
   3,817.61x = 5,752.42 × 3,139.47
4. Step 4: Simplify right side
   3,817.61x = 18,059,535.64
5. Step 5: Solve for x
   x = 18,059,535.64/3,817.61
6. Step 6: Final answer
   x = 4,730.59