Finding the Fourth Proportional to 6,081.25, 8,391.91 and 3,428.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,081.25 : 8,391.91 = 3,428.50 : x
2. Step 2: Convert to fraction form
   6,081.25/8,391.91 = 3,428.50/x
3. Step 3: Cross multiply
   6,081.25x = 8,391.91 × 3,428.50
4. Step 4: Simplify right side
   6,081.25x = 28,771,663.44
5. Step 5: Solve for x
   x = 28,771,663.44/6,081.25
6. Step 6: Final answer
   x = 4,731.21