Finding the Fourth Proportional to 1,294.33, 1,783.86 and 1,056.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,294.33 : 1,783.86 = 1,056.74 : x
2. Step 2: Convert to fraction form
   1,294.33/1,783.86 = 1,056.74/x
3. Step 3: Cross multiply
   1,294.33x = 1,783.86 × 1,056.74
4. Step 4: Simplify right side
   1,294.33x = 1,885,081.36
5. Step 5: Solve for x
   x = 1,885,081.36/1,294.33
6. Step 6: Final answer
   x = 1,456.42