Finding the Fourth Proportional to 1,785.62, 2,463.72 and 1,121.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,785.62 : 2,463.72 = 1,121.78 : x
2. Step 2: Convert to fraction form
   1,785.62/2,463.72 = 1,121.78/x
3. Step 3: Cross multiply
   1,785.62x = 2,463.72 × 1,121.78
4. Step 4: Simplify right side
   1,785.62x = 2,763,751.82
5. Step 5: Solve for x
   x = 2,763,751.82/1,785.62
6. Step 6: Final answer
   x = 1,547.78