Finding the Fourth Proportional to 9,896.29, 13,656.85 and 5,420.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,896.29 : 13,656.85 = 5,420.32 : x
2. Step 2: Convert to fraction form
   9,896.29/13,656.85 = 5,420.32/x
3. Step 3: Cross multiply
   9,896.29x = 13,656.85 × 5,420.32
4. Step 4: Simplify right side
   9,896.29x = 74,024,449.50
5. Step 5: Solve for x
   x = 74,024,449.50/9,896.29
6. Step 6: Final answer
   x = 7,480.02