Finding the Fourth Proportional to 9,402.78, 14,107.86 and 3,858.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,402.78 : 14,107.86 = 3,858.78 : x
2. Step 2: Convert to fraction form
   9,402.78/14,107.86 = 3,858.78/x
3. Step 3: Cross multiply
   9,402.78x = 14,107.86 × 3,858.78
4. Step 4: Simplify right side
   9,402.78x = 54,439,128.01
5. Step 5: Solve for x
   x = 54,439,128.01/9,402.78
6. Step 6: Final answer
   x = 5,789.68