Finding the Fourth Proportional to 1,378.29, 1,899.83 and 1,079.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378.29 : 1,899.83 = 1,079.03 : x
2. Step 2: Convert to fraction form
   1,378.29/1,899.83 = 1,079.03/x
3. Step 3: Cross multiply
   1,378.29x = 1,899.83 × 1,079.03
4. Step 4: Simplify right side
   1,378.29x = 2,049,963.42
5. Step 5: Solve for x
   x = 2,049,963.42/1,378.29
6. Step 6: Final answer
   x = 1,487.33