Finding the Fourth Proportional to 2,081.88, 3,123.66 and 783.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.88 : 3,123.66 = 783.72 : x
2. Step 2: Convert to fraction form
   2,081.88/3,123.66 = 783.72/x
3. Step 3: Cross multiply
   2,081.88x = 3,123.66 × 783.72
4. Step 4: Simplify right side
   2,081.88x = 2,448,074.82
5. Step 5: Solve for x
   x = 2,448,074.82/2,081.88
6. Step 6: Final answer
   x = 1,175.90