Finding the Fourth Proportional to 1,940.72, 2,678.24 and 1,056.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.72 : 2,678.24 = 1,056.53 : x
2. Step 2: Convert to fraction form
   1,940.72/2,678.24 = 1,056.53/x
3. Step 3: Cross multiply
   1,940.72x = 2,678.24 × 1,056.53
4. Step 4: Simplify right side
   1,940.72x = 2,829,650.24
5. Step 5: Solve for x
   x = 2,829,650.24/1,940.72
6. Step 6: Final answer
   x = 1,458.05