Finding the Fourth Proportional to 42,170.21, 58,114.83 and 30,212.79

Step by Step Solution

1. Step 1: Write the proportion equation
   42,170.21 : 58,114.83 = 30,212.79 : x
2. Step 2: Convert to fraction form
   42,170.21/58,114.83 = 30,212.79/x
3. Step 3: Cross multiply
   42,170.21x = 58,114.83 × 30,212.79
4. Step 4: Simplify right side
   42,170.21x = 1,755,811,154.68
5. Step 5: Solve for x
   x = 1,755,811,154.68/42,170.21
6. Step 6: Final answer
   x = 41,636.29