Finding the Fourth Proportional to 1,865.59, 2,800.22 and 1,422.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,865.59 : 2,800.22 = 1,422.72 : x
2. Step 2: Convert to fraction form
   1,865.59/2,800.22 = 1,422.72/x
3. Step 3: Cross multiply
   1,865.59x = 2,800.22 × 1,422.72
4. Step 4: Simplify right side
   1,865.59x = 3,983,921.88
5. Step 5: Solve for x
   x = 3,983,921.88/1,865.59
6. Step 6: Final answer
   x = 2,135.48