Finding the Fourth Proportional to 2,156.93, 2,979.79 and 1,719.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.93 : 2,979.79 = 1,719.53 : x
2. Step 2: Convert to fraction form
   2,156.93/2,979.79 = 1,719.53/x
3. Step 3: Cross multiply
   2,156.93x = 2,979.79 × 1,719.53
4. Step 4: Simplify right side
   2,156.93x = 5,123,830.28
5. Step 5: Solve for x
   x = 5,123,830.28/2,156.93
6. Step 6: Final answer
   x = 2,375.52