Finding the Fourth Proportional to 2,979.32, 4,463.91 and 1,866.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,979.32 : 4,463.91 = 1,866.78 : x
2. Step 2: Convert to fraction form
   2,979.32/4,463.91 = 1,866.78/x
3. Step 3: Cross multiply
   2,979.32x = 4,463.91 × 1,866.78
4. Step 4: Simplify right side
   2,979.32x = 8,333,137.91
5. Step 5: Solve for x
   x = 8,333,137.91/2,979.32
6. Step 6: Final answer
   x = 2,797.00