Finding the Fourth Proportional to 9,898.59, 13,659.68 and 5,422.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,898.59 : 13,659.68 = 5,422.37 : x
2. Step 2: Convert to fraction form
   9,898.59/13,659.68 = 5,422.37/x
3. Step 3: Cross multiply
   9,898.59x = 13,659.68 × 5,422.37
4. Step 4: Simplify right side
   9,898.59x = 74,067,839.04
5. Step 5: Solve for x
   x = 74,067,839.04/9,898.59
6. Step 6: Final answer
   x = 7,482.67