Finding the Fourth Proportional to 1,864.86, 2,573.57 and 1,025.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,864.86 : 2,573.57 = 1,025.63 : x
2. Step 2: Convert to fraction form
   1,864.86/2,573.57 = 1,025.63/x
3. Step 3: Cross multiply
   1,864.86x = 2,573.57 × 1,025.63
4. Step 4: Simplify right side
   1,864.86x = 2,639,519.82
5. Step 5: Solve for x
   x = 2,639,519.82/1,864.86
6. Step 6: Final answer
   x = 1,415.40