Finding the Fourth Proportional to 9,798.84, 13,521.87 and 5,549.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,798.84 : 13,521.87 = 5,549.31 : x
2. Step 2: Convert to fraction form
   9,798.84/13,521.87 = 5,549.31/x
3. Step 3: Cross multiply
   9,798.84x = 13,521.87 × 5,549.31
4. Step 4: Simplify right side
   9,798.84x = 75,037,048.41
5. Step 5: Solve for x
   x = 75,037,048.41/9,798.84
6. Step 6: Final answer
   x = 7,657.75