Finding the Fourth Proportional to 1,377.39, 2,054.91 and 1,264.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.39 : 2,054.91 = 1,264.49 : x
2. Step 2: Convert to fraction form
   1,377.39/2,054.91 = 1,264.49/x
3. Step 3: Cross multiply
   1,377.39x = 2,054.91 × 1,264.49
4. Step 4: Simplify right side
   1,377.39x = 2,598,406.82
5. Step 5: Solve for x
   x = 2,598,406.82/1,377.39
6. Step 6: Final answer
   x = 1,886.48