Finding the Fourth Proportional to 9,898.16, 13,659.48 and 5,422.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,898.16 : 13,659.48 = 5,422.10 : x
2. Step 2: Convert to fraction form
   9,898.16/13,659.48 = 5,422.10/x
3. Step 3: Cross multiply
   9,898.16x = 13,659.48 × 5,422.10
4. Step 4: Simplify right side
   9,898.16x = 74,062,998.21
5. Step 5: Solve for x
   x = 74,062,998.21/9,898.16
6. Step 6: Final answer
   x = 7,482.51