Finding the Fourth Proportional to 9,898.91, 13,660.50 and 5,422.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,898.91 : 13,660.50 = 5,422.83 : x
2. Step 2: Convert to fraction form
   9,898.91/13,660.50 = 5,422.83/x
3. Step 3: Cross multiply
   9,898.91x = 13,660.50 × 5,422.83
4. Step 4: Simplify right side
   9,898.91x = 74,078,538.32
5. Step 5: Solve for x
   x = 74,078,538.32/9,898.91
6. Step 6: Final answer
   x = 7,483.50