Finding the Fourth Proportional to 1,940.88, 2,678.42 and 1,056.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.88 : 2,678.42 = 1,056.69 : x
2. Step 2: Convert to fraction form
   1,940.88/2,678.42 = 1,056.69/x
3. Step 3: Cross multiply
   1,940.88x = 2,678.42 × 1,056.69
4. Step 4: Simplify right side
   1,940.88x = 2,830,254.35
5. Step 5: Solve for x
   x = 2,830,254.35/1,940.88
6. Step 6: Final answer
   x = 1,458.23