Finding the Fourth Proportional to 2,721.12, 4,081.72 and 773.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,721.12 : 4,081.72 = 773.32 : x
2. Step 2: Convert to fraction form
   2,721.12/4,081.72 = 773.32/x
3. Step 3: Cross multiply
   2,721.12x = 4,081.72 × 773.32
4. Step 4: Simplify right side
   2,721.12x = 3,156,475.71
5. Step 5: Solve for x
   x = 3,156,475.71/2,721.12
6. Step 6: Final answer
   x = 1,159.99