Finding the Fourth Proportional to 2,901.72, 3,979.71 and 2,782.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,901.72 : 3,979.71 = 2,782.68 : x
2. Step 2: Convert to fraction form
   2,901.72/3,979.71 = 2,782.68/x
3. Step 3: Cross multiply
   2,901.72x = 3,979.71 × 2,782.68
4. Step 4: Simplify right side
   2,901.72x = 11,074,259.42
5. Step 5: Solve for x
   x = 11,074,259.42/2,901.72
6. Step 6: Final answer
   x = 3,816.45