Finding the Fourth Proportional to 5,469.71, 8,191.50 and 2,830.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,469.71 : 8,191.50 = 2,830.12 : x
2. Step 2: Convert to fraction form
   5,469.71/8,191.50 = 2,830.12/x
3. Step 3: Cross multiply
   5,469.71x = 8,191.50 × 2,830.12
4. Step 4: Simplify right side
   5,469.71x = 23,182,896.89
5. Step 5: Solve for x
   x = 23,182,896.89/5,469.71
6. Step 6: Final answer
   x = 4,238.42