Finding the Fourth Proportional to 2,622.16, 3,617.76 and 1,572.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.16 : 3,617.76 = 1,572.40 : x
2. Step 2: Convert to fraction form
   2,622.16/3,617.76 = 1,572.40/x
3. Step 3: Cross multiply
   2,622.16x = 3,617.76 × 1,572.40
4. Step 4: Simplify right side
   2,622.16x = 5,688,565.82
5. Step 5: Solve for x
   x = 5,688,565.82/2,622.16
6. Step 6: Final answer
   x = 2,169.42