Finding the Fourth Proportional to 2,572.74, 3,550.20 and 1,578.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.74 : 3,550.20 = 1,578.06 : x
2. Step 2: Convert to fraction form
   2,572.74/3,550.20 = 1,578.06/x
3. Step 3: Cross multiply
   2,572.74x = 3,550.20 × 1,578.06
4. Step 4: Simplify right side
   2,572.74x = 5,602,428.61
5. Step 5: Solve for x
   x = 5,602,428.61/2,572.74
6. Step 6: Final answer
   x = 2,177.61