Finding the Fourth Proportional to 2,572.15, 3,549.52 and 1,393.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.15 : 3,549.52 = 1,393.21 : x
2. Step 2: Convert to fraction form
   2,572.15/3,549.52 = 1,393.21/x
3. Step 3: Cross multiply
   2,572.15x = 3,549.52 × 1,393.21
4. Step 4: Simplify right side
   2,572.15x = 4,945,226.76
5. Step 5: Solve for x
   x = 4,945,226.76/2,572.15
6. Step 6: Final answer
   x = 1,922.60