Finding the Fourth Proportional to 8,819.89, 12,171.63 and 5,043.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,819.89 : 12,171.63 = 5,043.40 : x
2. Step 2: Convert to fraction form
   8,819.89/12,171.63 = 5,043.40/x
3. Step 3: Cross multiply
   8,819.89x = 12,171.63 × 5,043.40
4. Step 4: Simplify right side
   8,819.89x = 61,386,387.23
5. Step 5: Solve for x
   x = 61,386,387.23/8,819.89
6. Step 6: Final answer
   x = 6,960.00