Finding the Fourth Proportional to 1,738.58, 2,609.69 and 916.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,738.58 : 2,609.69 = 916.63 : x
2. Step 2: Convert to fraction form
   1,738.58/2,609.69 = 916.63/x
3. Step 3: Cross multiply
   1,738.58x = 2,609.69 × 916.63
4. Step 4: Simplify right side
   1,738.58x = 2,392,109.04
5. Step 5: Solve for x
   x = 2,392,109.04/1,738.58
6. Step 6: Final answer
   x = 1,375.90