Finding the Fourth Proportional to 2,113.67, 2,916.56 and 1,274.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.67 : 2,916.56 = 1,274.58 : x
2. Step 2: Convert to fraction form
   2,113.67/2,916.56 = 1,274.58/x
3. Step 3: Cross multiply
   2,113.67x = 2,916.56 × 1,274.58
4. Step 4: Simplify right side
   2,113.67x = 3,717,392.23
5. Step 5: Solve for x
   x = 3,717,392.23/2,113.67
6. Step 6: Final answer
   x = 1,758.74