Finding the Fourth Proportional to 2,916.36, 4,380.72 and 2,784.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,916.36 : 4,380.72 = 2,784.18 : x
2. Step 2: Convert to fraction form
   2,916.36/4,380.72 = 2,784.18/x
3. Step 3: Cross multiply
   2,916.36x = 4,380.72 × 2,784.18
4. Step 4: Simplify right side
   2,916.36x = 12,196,713.01
5. Step 5: Solve for x
   x = 12,196,713.01/2,916.36
6. Step 6: Final answer
   x = 4,182.17