Finding the Fourth Proportional to 9,896.59, 13,656.92 and 5,420.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,896.59 : 13,656.92 = 5,420.37 : x
2. Step 2: Convert to fraction form
   9,896.59/13,656.92 = 5,420.37/x
3. Step 3: Cross multiply
   9,896.59x = 13,656.92 × 5,420.37
4. Step 4: Simplify right side
   9,896.59x = 74,025,614.06
5. Step 5: Solve for x
   x = 74,025,614.06/9,896.59
6. Step 6: Final answer
   x = 7,479.91