Finding the Fourth Proportional to 9,898.31, 13,659.90 and 5,422.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,898.31 : 13,659.90 = 5,422.03 : x
2. Step 2: Convert to fraction form
   9,898.31/13,659.90 = 5,422.03/x
3. Step 3: Cross multiply
   9,898.31x = 13,659.90 × 5,422.03
4. Step 4: Simplify right side
   9,898.31x = 74,064,353.45
5. Step 5: Solve for x
   x = 74,064,353.45/9,898.31
6. Step 6: Final answer
   x = 7,482.52