Finding the Fourth Proportional to 9,898.83, 13,660.32 and 5,422.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,898.83 : 13,660.32 = 5,422.55 : x
2. Step 2: Convert to fraction form
   9,898.83/13,660.32 = 5,422.55/x
3. Step 3: Cross multiply
   9,898.83x = 13,660.32 × 5,422.55
4. Step 4: Simplify right side
   9,898.83x = 74,073,705.00
5. Step 5: Solve for x
   x = 74,073,705.00/9,898.83
6. Step 6: Final answer
   x = 7,483.07