Finding the Fourth Proportional to 8,978.71, 13,468.98 and 3,436.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.71 : 13,468.98 = 3,436.71 : x
2. Step 2: Convert to fraction form
   8,978.71/13,468.98 = 3,436.71/x
3. Step 3: Cross multiply
   8,978.71x = 13,468.98 × 3,436.71
4. Step 4: Simplify right side
   8,978.71x = 46,288,978.26
5. Step 5: Solve for x
   x = 46,288,978.26/8,978.71
6. Step 6: Final answer
   x = 5,155.42