Finding the Fourth Proportional to 1,915.01, 2,642.74 and 1,118.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.01 : 2,642.74 = 1,118.38 : x
2. Step 2: Convert to fraction form
   1,915.01/2,642.74 = 1,118.38/x
3. Step 3: Cross multiply
   1,915.01x = 2,642.74 × 1,118.38
4. Step 4: Simplify right side
   1,915.01x = 2,955,578.16
5. Step 5: Solve for x
   x = 2,955,578.16/1,915.01
6. Step 6: Final answer
   x = 1,543.37