Finding the Fourth Proportional to 8,317.86, 12,476.76 and 3,386.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,317.86 : 12,476.76 = 3,386.40 : x
2. Step 2: Convert to fraction form
   8,317.86/12,476.76 = 3,386.40/x
3. Step 3: Cross multiply
   8,317.86x = 12,476.76 × 3,386.40
4. Step 4: Simplify right side
   8,317.86x = 42,251,300.06
5. Step 5: Solve for x
   x = 42,251,300.06/8,317.86
6. Step 6: Final answer
   x = 5,079.59