Finding the Fourth Proportional to 8,603.28, 12,901.83 and 2,979.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,603.28 : 12,901.83 = 2,979.42 : x
2. Step 2: Convert to fraction form
   8,603.28/12,901.83 = 2,979.42/x
3. Step 3: Cross multiply
   8,603.28x = 12,901.83 × 2,979.42
4. Step 4: Simplify right side
   8,603.28x = 38,439,970.34
5. Step 5: Solve for x
   x = 38,439,970.34/8,603.28
6. Step 6: Final answer
   x = 4,468.06