Finding the Fourth Proportional to 2,012.58, 3,019.95 and 1,865.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.58 : 3,019.95 = 1,865.70 : x
2. Step 2: Convert to fraction form
   2,012.58/3,019.95 = 1,865.70/x
3. Step 3: Cross multiply
   2,012.58x = 3,019.95 × 1,865.70
4. Step 4: Simplify right side
   2,012.58x = 5,634,320.72
5. Step 5: Solve for x
   x = 5,634,320.72/2,012.58
6. Step 6: Final answer
   x = 2,799.55