Finding the Fourth Proportional to 42,020.60, 57,908.61 and 30,063.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,020.60 : 57,908.61 = 30,063.20 : x
2. Step 2: Convert to fraction form
   42,020.60/57,908.61 = 30,063.20/x
3. Step 3: Cross multiply
   42,020.60x = 57,908.61 × 30,063.20
4. Step 4: Simplify right side
   42,020.60x = 1,740,917,834.61
5. Step 5: Solve for x
   x = 1,740,917,834.61/42,020.60
6. Step 6: Final answer
   x = 41,430.11