Finding the Fourth Proportional to 1,357.81, 1,874.33 and 916.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.81 : 1,874.33 = 916.99 : x
2. Step 2: Convert to fraction form
   1,357.81/1,874.33 = 916.99/x
3. Step 3: Cross multiply
   1,357.81x = 1,874.33 × 916.99
4. Step 4: Simplify right side
   1,357.81x = 1,718,741.87
5. Step 5: Solve for x
   x = 1,718,741.87/1,357.81
6. Step 6: Final answer
   x = 1,265.82