Finding the Fourth Proportional to 8,931.84, 12,321.36 and 5,789.04

Step by Step Solution

1. Step 1: Write the proportion equation
   8,931.84 : 12,321.36 = 5,789.04 : x
2. Step 2: Convert to fraction form
   8,931.84/12,321.36 = 5,789.04/x
3. Step 3: Cross multiply
   8,931.84x = 12,321.36 × 5,789.04
4. Step 4: Simplify right side
   8,931.84x = 71,328,845.89
5. Step 5: Solve for x
   x = 71,328,845.89/8,931.84
6. Step 6: Final answer
   x = 7,985.91