Finding the Fourth Proportional to 9,898.49, 13,660.25 and 5,422.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,898.49 : 13,660.25 = 5,422.23 : x
2. Step 2: Convert to fraction form
   9,898.49/13,660.25 = 5,422.23/x
3. Step 3: Cross multiply
   9,898.49x = 13,660.25 × 5,422.23
4. Step 4: Simplify right side
   9,898.49x = 74,068,990.25
5. Step 5: Solve for x
   x = 74,068,990.25/9,898.49
6. Step 6: Final answer
   x = 7,482.86