Finding the Fourth Proportional to 1,377.20, 1,900.76 and 1,025.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.20 : 1,900.76 = 1,025.46 : x
2. Step 2: Convert to fraction form
   1,377.20/1,900.76 = 1,025.46/x
3. Step 3: Cross multiply
   1,377.20x = 1,900.76 × 1,025.46
4. Step 4: Simplify right side
   1,377.20x = 1,949,148.22
5. Step 5: Solve for x
   x = 1,949,148.22/1,377.20
6. Step 6: Final answer
   x = 1,415.30