Finding the Fourth Proportional to 1,859.04, 2,565.31 and 1,019.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,859.04 : 2,565.31 = 1,019.72 : x
2. Step 2: Convert to fraction form
   1,859.04/2,565.31 = 1,019.72/x
3. Step 3: Cross multiply
   1,859.04x = 2,565.31 × 1,019.72
4. Step 4: Simplify right side
   1,859.04x = 2,615,897.91
5. Step 5: Solve for x
   x = 2,615,897.91/1,859.04
6. Step 6: Final answer
   x = 1,407.12