Finding the Fourth Proportional to 1,379.79, 1,901.89 and 1,080.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.79 : 1,901.89 = 1,080.53 : x
2. Step 2: Convert to fraction form
   1,379.79/1,901.89 = 1,080.53/x
3. Step 3: Cross multiply
   1,379.79x = 1,901.89 × 1,080.53
4. Step 4: Simplify right side
   1,379.79x = 2,055,049.20
5. Step 5: Solve for x
   x = 2,055,049.20/1,379.79
6. Step 6: Final answer
   x = 1,489.39