Finding the Fourth Proportional to 8,978.94, 13,468.48 and 3,135.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.94 : 13,468.48 = 3,135.56 : x
2. Step 2: Convert to fraction form
   8,978.94/13,468.48 = 3,135.56/x
3. Step 3: Cross multiply
   8,978.94x = 13,468.48 × 3,135.56
4. Step 4: Simplify right side
   8,978.94x = 42,231,151.97
5. Step 5: Solve for x
   x = 42,231,151.97/8,978.94
6. Step 6: Final answer
   x = 4,703.36