Finding the Fourth Proportional to 9,428.27, 14,139.96 and 3,878.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,428.27 : 14,139.96 = 3,878.57 : x
2. Step 2: Convert to fraction form
   9,428.27/14,139.96 = 3,878.57/x
3. Step 3: Cross multiply
   9,428.27x = 14,139.96 × 3,878.57
4. Step 4: Simplify right side
   9,428.27x = 54,842,824.66
5. Step 5: Solve for x
   x = 54,842,824.66/9,428.27
6. Step 6: Final answer
   x = 5,816.85