Finding the Fourth Proportional to 2,807.72, 4,219.78 and 2,604.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,807.72 : 4,219.78 = 2,604.07 : x
2. Step 2: Convert to fraction form
   2,807.72/4,219.78 = 2,604.07/x
3. Step 3: Cross multiply
   2,807.72x = 4,219.78 × 2,604.07
4. Step 4: Simplify right side
   2,807.72x = 10,988,602.50
5. Step 5: Solve for x
   x = 10,988,602.50/2,807.72
6. Step 6: Final answer
   x = 3,913.71