Finding the Fourth Proportional to 6,890.18, 10,339.52 and 3,191.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,890.18 : 10,339.52 = 3,191.72 : x
2. Step 2: Convert to fraction form
   6,890.18/10,339.52 = 3,191.72/x
3. Step 3: Cross multiply
   6,890.18x = 10,339.52 × 3,191.72
4. Step 4: Simplify right side
   6,890.18x = 33,000,785.12
5. Step 5: Solve for x
   x = 33,000,785.12/6,890.18
6. Step 6: Final answer
   x = 4,789.54