Finding the Fourth Proportional to 9,897.98, 13,659.28 and 5,422.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,897.98 : 13,659.28 = 5,422.14 : x
2. Step 2: Convert to fraction form
   9,897.98/13,659.28 = 5,422.14/x
3. Step 3: Cross multiply
   9,897.98x = 13,659.28 × 5,422.14
4. Step 4: Simplify right side
   9,897.98x = 74,062,528.46
5. Step 5: Solve for x
   x = 74,062,528.46/9,897.98
6. Step 6: Final answer
   x = 7,482.59