Finding the Fourth Proportional to 30,572.57, 42,172.27 and 19,224.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,572.57 : 42,172.27 = 19,224.10 : x
2. Step 2: Convert to fraction form
   30,572.57/42,172.27 = 19,224.10/x
3. Step 3: Cross multiply
   30,572.57x = 42,172.27 × 19,224.10
4. Step 4: Simplify right side
   30,572.57x = 810,723,935.71
5. Step 5: Solve for x
   x = 810,723,935.71/30,572.57
6. Step 6: Final answer
   x = 26,518.02