Finding the Fourth Proportional to 1,379.42, 1,901.38 and 1,080.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.42 : 1,901.38 = 1,080.16 : x
2. Step 2: Convert to fraction form
   1,379.42/1,901.38 = 1,080.16/x
3. Step 3: Cross multiply
   1,379.42x = 1,901.38 × 1,080.16
4. Step 4: Simplify right side
   1,379.42x = 2,053,779.71
5. Step 5: Solve for x
   x = 2,053,779.71/1,379.42
6. Step 6: Final answer
   x = 1,488.88