Finding the Fourth Proportional to 1,872.90, 2,807.55 and 1,456.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,872.90 : 2,807.55 = 1,456.20 : x
2. Step 2: Convert to fraction form
   1,872.90/2,807.55 = 1,456.20/x
3. Step 3: Cross multiply
   1,872.90x = 2,807.55 × 1,456.20
4. Step 4: Simplify right side
   1,872.90x = 4,088,354.31
5. Step 5: Solve for x
   x = 4,088,354.31/1,872.90
6. Step 6: Final answer
   x = 2,182.90