Finding the Fourth Proportional to 1,915.05, 2,642.70 and 1,170.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.05 : 2,642.70 = 1,170.26 : x
2. Step 2: Convert to fraction form
   1,915.05/2,642.70 = 1,170.26/x
3. Step 3: Cross multiply
   1,915.05x = 2,642.70 × 1,170.26
4. Step 4: Simplify right side
   1,915.05x = 3,092,646.10
5. Step 5: Solve for x
   x = 3,092,646.10/1,915.05
6. Step 6: Final answer
   x = 1,614.92