Finding the Fourth Proportional to 8,356.65, 12,534.91 and 3,426.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,356.65 : 12,534.91 = 3,426.28 : x
2. Step 2: Convert to fraction form
   8,356.65/12,534.91 = 3,426.28/x
3. Step 3: Cross multiply
   8,356.65x = 12,534.91 × 3,426.28
4. Step 4: Simplify right side
   8,356.65x = 42,948,111.43
5. Step 5: Solve for x
   x = 42,948,111.43/8,356.65
6. Step 6: Final answer
   x = 5,139.39