Finding the Fourth Proportional to 2,080.88, 3,122.16 and 782.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.88 : 3,122.16 = 782.72 : x
2. Step 2: Convert to fraction form
   2,080.88/3,122.16 = 782.72/x
3. Step 3: Cross multiply
   2,080.88x = 3,122.16 × 782.72
4. Step 4: Simplify right side
   2,080.88x = 2,443,777.08
5. Step 5: Solve for x
   x = 2,443,777.08/2,080.88
6. Step 6: Final answer
   x = 1,174.40