Finding the Fourth Proportional to 2,380.71, 3,285.78 and 2,275.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.71 : 3,285.78 = 2,275.59 : x
2. Step 2: Convert to fraction form
   2,380.71/3,285.78 = 2,275.59/x
3. Step 3: Cross multiply
   2,380.71x = 3,285.78 × 2,275.59
4. Step 4: Simplify right side
   2,380.71x = 7,477,088.11
5. Step 5: Solve for x
   x = 7,477,088.11/2,380.71
6. Step 6: Final answer
   x = 3,140.70