Finding the Fourth Proportional to 1,359.23, 1,873.55 and 916.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.23 : 1,873.55 = 916.36 : x
2. Step 2: Convert to fraction form
   1,359.23/1,873.55 = 916.36/x
3. Step 3: Cross multiply
   1,359.23x = 1,873.55 × 916.36
4. Step 4: Simplify right side
   1,359.23x = 1,716,849.27
5. Step 5: Solve for x
   x = 1,716,849.27/1,359.23
6. Step 6: Final answer
   x = 1,263.10