Finding the Fourth Proportional to 2,275.38, 3,139.74 and 1,435.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,275.38 : 3,139.74 = 1,435.77 : x
2. Step 2: Convert to fraction form
   2,275.38/3,139.74 = 1,435.77/x
3. Step 3: Cross multiply
   2,275.38x = 3,139.74 × 1,435.77
4. Step 4: Simplify right side
   2,275.38x = 4,507,944.50
5. Step 5: Solve for x
   x = 4,507,944.50/2,275.38
6. Step 6: Final answer
   x = 1,981.18