Finding the Fourth Proportional to 9,898.93, 13,658.79 and 5,648.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,898.93 : 13,658.79 = 5,648.05 : x
2. Step 2: Convert to fraction form
   9,898.93/13,658.79 = 5,648.05/x
3. Step 3: Cross multiply
   9,898.93x = 13,658.79 × 5,648.05
4. Step 4: Simplify right side
   9,898.93x = 77,145,528.86
5. Step 5: Solve for x
   x = 77,145,528.86/9,898.93
6. Step 6: Final answer
   x = 7,793.32