Finding the Fourth Proportional to 9,426.31, 14,139.02 and 3,878.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,426.31 : 14,139.02 = 3,878.28 : x
2. Step 2: Convert to fraction form
   9,426.31/14,139.02 = 3,878.28/x
3. Step 3: Cross multiply
   9,426.31x = 14,139.02 × 3,878.28
4. Step 4: Simplify right side
   9,426.31x = 54,835,088.18
5. Step 5: Solve for x
   x = 54,835,088.18/9,426.31
6. Step 6: Final answer
   x = 5,817.24