Finding the Fourth Proportional to 1,915.98, 2,643.86 and 1,170.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.98 : 2,643.86 = 1,170.12 : x
2. Step 2: Convert to fraction form
   1,915.98/2,643.86 = 1,170.12/x
3. Step 3: Cross multiply
   1,915.98x = 2,643.86 × 1,170.12
4. Step 4: Simplify right side
   1,915.98x = 3,093,627.61
5. Step 5: Solve for x
   x = 3,093,627.61/1,915.98
6. Step 6: Final answer
   x = 1,614.65