Finding the Fourth Proportional to 2,111.41, 2,916.17 and 1,720.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.41 : 2,916.17 = 1,720.45 : x
2. Step 2: Convert to fraction form
   2,111.41/2,916.17 = 1,720.45/x
3. Step 3: Cross multiply
   2,111.41x = 2,916.17 × 1,720.45
4. Step 4: Simplify right side
   2,111.41x = 5,017,124.68
5. Step 5: Solve for x
   x = 5,017,124.68/2,111.41
6. Step 6: Final answer
   x = 2,376.20