Finding the Fourth Proportional to 8,818.34, 12,171.90 and 5,043.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,818.34 : 12,171.90 = 5,043.64 : x
2. Step 2: Convert to fraction form
   8,818.34/12,171.90 = 5,043.64/x
3. Step 3: Cross multiply
   8,818.34x = 12,171.90 × 5,043.64
4. Step 4: Simplify right side
   8,818.34x = 61,390,681.72
5. Step 5: Solve for x
   x = 61,390,681.72/8,818.34
6. Step 6: Final answer
   x = 6,961.71