Finding the Fourth Proportional to 12,920.89, 17,832.48 and 7,884.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,920.89 : 17,832.48 = 7,884.04 : x
2. Step 2: Convert to fraction form
   12,920.89/17,832.48 = 7,884.04/x
3. Step 3: Cross multiply
   12,920.89x = 17,832.48 × 7,884.04
4. Step 4: Simplify right side
   12,920.89x = 140,592,017.24
5. Step 5: Solve for x
   x = 140,592,017.24/12,920.89
6. Step 6: Final answer
   x = 10,880.98