Finding the Fourth Proportional to 1,916.32, 2,643.72 and 1,170.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,916.32 : 2,643.72 = 1,170.14 : x
2. Step 2: Convert to fraction form
   1,916.32/2,643.72 = 1,170.14/x
3. Step 3: Cross multiply
   1,916.32x = 2,643.72 × 1,170.14
4. Step 4: Simplify right side
   1,916.32x = 3,093,522.52
5. Step 5: Solve for x
   x = 3,093,522.52/1,916.32
6. Step 6: Final answer
   x = 1,614.30