Finding the Fourth Proportional to 9,898.36, 13,659.72 and 5,422.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,898.36 : 13,659.72 = 5,422.38 : x
2. Step 2: Convert to fraction form
   9,898.36/13,659.72 = 5,422.38/x
3. Step 3: Cross multiply
   9,898.36x = 13,659.72 × 5,422.38
4. Step 4: Simplify right side
   9,898.36x = 74,068,192.53
5. Step 5: Solve for x
   x = 74,068,192.53/9,898.36
6. Step 6: Final answer
   x = 7,482.88