Finding the Fourth Proportional to 9,868.89, 13,618.82 and 5,392.66

Step by Step Solution

1. Step 1: Write the proportion equation
   9,868.89 : 13,618.82 = 5,392.66 : x
2. Step 2: Convert to fraction form
   9,868.89/13,618.82 = 5,392.66/x
3. Step 3: Cross multiply
   9,868.89x = 13,618.82 × 5,392.66
4. Step 4: Simplify right side
   9,868.89x = 73,441,638.90
5. Step 5: Solve for x
   x = 73,441,638.90/9,868.89
6. Step 6: Final answer
   x = 7,441.74