Finding the Fourth Proportional to 1,375.31, 1,898.01 and 1,080.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.31 : 1,898.01 = 1,080.07 : x
2. Step 2: Convert to fraction form
   1,375.31/1,898.01 = 1,080.07/x
3. Step 3: Cross multiply
   1,375.31x = 1,898.01 × 1,080.07
4. Step 4: Simplify right side
   1,375.31x = 2,049,983.66
5. Step 5: Solve for x
   x = 2,049,983.66/1,375.31
6. Step 6: Final answer
   x = 1,490.56