Finding the Fourth Proportional to 1,867.58, 2,801.82 and 1,320.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,867.58 : 2,801.82 = 1,320.83 : x
2. Step 2: Convert to fraction form
   1,867.58/2,801.82 = 1,320.83/x
3. Step 3: Cross multiply
   1,867.58x = 2,801.82 × 1,320.83
4. Step 4: Simplify right side
   1,867.58x = 3,700,727.91
5. Step 5: Solve for x
   x = 3,700,727.91/1,867.58
6. Step 6: Final answer
   x = 1,981.56