Finding the Fourth Proportional to 2,081.90, 3,124.14 and 784.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.90 : 3,124.14 = 784.28 : x
2. Step 2: Convert to fraction form
   2,081.90/3,124.14 = 784.28/x
3. Step 3: Cross multiply
   2,081.90x = 3,124.14 × 784.28
4. Step 4: Simplify right side
   2,081.90x = 2,450,200.52
5. Step 5: Solve for x
   x = 2,450,200.52/2,081.90
6. Step 6: Final answer
   x = 1,176.91