Finding the Fourth Proportional to 1,358.34, 1,873.72 and 916.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.34 : 1,873.72 = 916.36 : x
2. Step 2: Convert to fraction form
   1,358.34/1,873.72 = 916.36/x
3. Step 3: Cross multiply
   1,358.34x = 1,873.72 × 916.36
4. Step 4: Simplify right side
   1,358.34x = 1,717,002.06
5. Step 5: Solve for x
   x = 1,717,002.06/1,358.34
6. Step 6: Final answer
   x = 1,264.04