Finding the Fourth Proportional to 1,380.17, 1,904.81 and 1,048.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.17 : 1,904.81 = 1,048.02 : x
2. Step 2: Convert to fraction form
   1,380.17/1,904.81 = 1,048.02/x
3. Step 3: Cross multiply
   1,380.17x = 1,904.81 × 1,048.02
4. Step 4: Simplify right side
   1,380.17x = 1,996,273.74
5. Step 5: Solve for x
   x = 1,996,273.74/1,380.17
6. Step 6: Final answer
   x = 1,446.40