Finding the Fourth Proportional to 2,681.76, 4,023.48 and 807.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,681.76 : 4,023.48 = 807.72 : x
2. Step 2: Convert to fraction form
   2,681.76/4,023.48 = 807.72/x
3. Step 3: Cross multiply
   2,681.76x = 4,023.48 × 807.72
4. Step 4: Simplify right side
   2,681.76x = 3,249,845.27
5. Step 5: Solve for x
   x = 3,249,845.27/2,681.76
6. Step 6: Final answer
   x = 1,211.83