Finding the Fourth Proportional to 1,864.78, 2,573.35 and 1,025.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,864.78 : 2,573.35 = 1,025.49 : x
2. Step 2: Convert to fraction form
   1,864.78/2,573.35 = 1,025.49/x
3. Step 3: Cross multiply
   1,864.78x = 2,573.35 × 1,025.49
4. Step 4: Simplify right side
   1,864.78x = 2,638,944.69
5. Step 5: Solve for x
   x = 2,638,944.69/1,864.78
6. Step 6: Final answer
   x = 1,415.15