Finding the Fourth Proportional to 2,072.98, 3,123.76 and 1,715.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.98 : 3,123.76 = 1,715.80 : x
2. Step 2: Convert to fraction form
   2,072.98/3,123.76 = 1,715.80/x
3. Step 3: Cross multiply
   2,072.98x = 3,123.76 × 1,715.80
4. Step 4: Simplify right side
   2,072.98x = 5,359,747.41
5. Step 5: Solve for x
   x = 5,359,747.41/2,072.98
6. Step 6: Final answer
   x = 2,585.53