Finding the Fourth Proportional to 1,916.62, 2,873.31 and 1,145.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,916.62 : 2,873.31 = 1,145.50 : x
2. Step 2: Convert to fraction form
   1,916.62/2,873.31 = 1,145.50/x
3. Step 3: Cross multiply
   1,916.62x = 2,873.31 × 1,145.50
4. Step 4: Simplify right side
   1,916.62x = 3,291,376.61
5. Step 5: Solve for x
   x = 3,291,376.61/1,916.62
6. Step 6: Final answer
   x = 1,717.28