Finding the Fourth Proportional to 1,371.60, 2,058.48 and 1,224.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.60 : 2,058.48 = 1,224.72 : x
2. Step 2: Convert to fraction form
   1,371.60/2,058.48 = 1,224.72/x
3. Step 3: Cross multiply
   1,371.60x = 2,058.48 × 1,224.72
4. Step 4: Simplify right side
   1,371.60x = 2,521,061.63
5. Step 5: Solve for x
   x = 2,521,061.63/1,371.60
6. Step 6: Final answer
   x = 1,838.04