Finding the Fourth Proportional to 9,428.98, 14,138.06 and 3,886.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,428.98 : 14,138.06 = 3,886.15 : x
2. Step 2: Convert to fraction form
   9,428.98/14,138.06 = 3,886.15/x
3. Step 3: Cross multiply
   9,428.98x = 14,138.06 × 3,886.15
4. Step 4: Simplify right side
   9,428.98x = 54,942,621.87
5. Step 5: Solve for x
   x = 54,942,621.87/9,428.98
6. Step 6: Final answer
   x = 5,827.00