Finding the Fourth Proportional to 1,665.78, 2,500.19 and 844.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.78 : 2,500.19 = 844.62 : x
2. Step 2: Convert to fraction form
   1,665.78/2,500.19 = 844.62/x
3. Step 3: Cross multiply
   1,665.78x = 2,500.19 × 844.62
4. Step 4: Simplify right side
   1,665.78x = 2,111,700.05
5. Step 5: Solve for x
   x = 2,111,700.05/1,665.78
6. Step 6: Final answer
   x = 1,267.70