Finding the Fourth Proportional to 9,898.42, 13,659.96 and 5,422.08

Step by Step Solution

1. Step 1: Write the proportion equation
   9,898.42 : 13,659.96 = 5,422.08 : x
2. Step 2: Convert to fraction form
   9,898.42/13,659.96 = 5,422.08/x
3. Step 3: Cross multiply
   9,898.42x = 13,659.96 × 5,422.08
4. Step 4: Simplify right side
   9,898.42x = 74,065,395.92
5. Step 5: Solve for x
   x = 74,065,395.92/9,898.42
6. Step 6: Final answer
   x = 7,482.55