Finding the Fourth Proportional to 1,380.82, 2,058.13 and 1,275.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.82 : 2,058.13 = 1,275.48 : x
2. Step 2: Convert to fraction form
   1,380.82/2,058.13 = 1,275.48/x
3. Step 3: Cross multiply
   1,380.82x = 2,058.13 × 1,275.48
4. Step 4: Simplify right side
   1,380.82x = 2,625,108.18
5. Step 5: Solve for x
   x = 2,625,108.18/1,380.82
6. Step 6: Final answer
   x = 1,901.13