Finding the Fourth Proportional to 1,915.70, 2,854.28 and 1,789.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.70 : 2,854.28 = 1,789.96 : x
2. Step 2: Convert to fraction form
   1,915.70/2,854.28 = 1,789.96/x
3. Step 3: Cross multiply
   1,915.70x = 2,854.28 × 1,789.96
4. Step 4: Simplify right side
   1,915.70x = 5,109,047.03
5. Step 5: Solve for x
   x = 5,109,047.03/1,915.70
6. Step 6: Final answer
   x = 2,666.93