Finding the Fourth Proportional to 2,719.98, 4,079.61 and 772.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,719.98 : 4,079.61 = 772.38 : x
2. Step 2: Convert to fraction form
   2,719.98/4,079.61 = 772.38/x
3. Step 3: Cross multiply
   2,719.98x = 4,079.61 × 772.38
4. Step 4: Simplify right side
   2,719.98x = 3,151,009.17
5. Step 5: Solve for x
   x = 3,151,009.17/2,719.98
6. Step 6: Final answer
   x = 1,158.47