Finding the Fourth Proportional to 9,886.62, 13,643.46 and 5,410.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,886.62 : 13,643.46 = 5,410.28 : x
2. Step 2: Convert to fraction form
   9,886.62/13,643.46 = 5,410.28/x
3. Step 3: Cross multiply
   9,886.62x = 13,643.46 × 5,410.28
4. Step 4: Simplify right side
   9,886.62x = 73,814,938.77
5. Step 5: Solve for x
   x = 73,814,938.77/9,886.62
6. Step 6: Final answer
   x = 7,466.15