Finding the Fourth Proportional to 1,910.54, 2,637.42 and 1,390.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,910.54 : 2,637.42 = 1,390.52 : x
2. Step 2: Convert to fraction form
   1,910.54/2,637.42 = 1,390.52/x
3. Step 3: Cross multiply
   1,910.54x = 2,637.42 × 1,390.52
4. Step 4: Simplify right side
   1,910.54x = 3,667,385.26
5. Step 5: Solve for x
   x = 3,667,385.26/1,910.54
6. Step 6: Final answer
   x = 1,919.55