Finding the Fourth Proportional to 1,859.12, 2,785.72 and 981.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,859.12 : 2,785.72 = 981.59 : x
2. Step 2: Convert to fraction form
   1,859.12/2,785.72 = 981.59/x
3. Step 3: Cross multiply
   1,859.12x = 2,785.72 × 981.59
4. Step 4: Simplify right side
   1,859.12x = 2,734,434.89
5. Step 5: Solve for x
   x = 2,734,434.89/1,859.12
6. Step 6: Final answer
   x = 1,470.82