Finding the Fourth Proportional to 1,940.91, 2,678.48 and 1,056.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.91 : 2,678.48 = 1,056.72 : x
2. Step 2: Convert to fraction form
   1,940.91/2,678.48 = 1,056.72/x
3. Step 3: Cross multiply
   1,940.91x = 2,678.48 × 1,056.72
4. Step 4: Simplify right side
   1,940.91x = 2,830,398.10
5. Step 5: Solve for x
   x = 2,830,398.10/1,940.91
6. Step 6: Final answer
   x = 1,458.28