Finding the Fourth Proportional to 1,407.28, 1,940.88 and 1,059.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.28 : 1,940.88 = 1,059.04 : x
2. Step 2: Convert to fraction form
   1,407.28/1,940.88 = 1,059.04/x
3. Step 3: Cross multiply
   1,407.28x = 1,940.88 × 1,059.04
4. Step 4: Simplify right side
   1,407.28x = 2,055,469.56
5. Step 5: Solve for x
   x = 2,055,469.56/1,407.28
6. Step 6: Final answer
   x = 1,460.60