Finding the Fourth Proportional to 1,146.96, 1,718.82 and 916.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.96 : 1,718.82 = 916.38 : x
2. Step 2: Convert to fraction form
   1,146.96/1,718.82 = 916.38/x
3. Step 3: Cross multiply
   1,146.96x = 1,718.82 × 916.38
4. Step 4: Simplify right side
   1,146.96x = 1,575,092.27
5. Step 5: Solve for x
   x = 1,575,092.27/1,146.96
6. Step 6: Final answer
   x = 1,373.28