Finding the Fourth Proportional to 10,218.97, 15,334.27 and 3,978.17

Step by Step Solution

1. Step 1: Write the proportion equation
   10,218.97 : 15,334.27 = 3,978.17 : x
2. Step 2: Convert to fraction form
   10,218.97/15,334.27 = 3,978.17/x
3. Step 3: Cross multiply
   10,218.97x = 15,334.27 × 3,978.17
4. Step 4: Simplify right side
   10,218.97x = 61,002,342.83
5. Step 5: Solve for x
   x = 61,002,342.83/10,218.97
6. Step 6: Final answer
   x = 5,969.52