Finding the Fourth Proportional to 30,570.18, 42,129.78 and 23,845.20

Step by Step Solution

1. Step 1: Write the proportion equation
   30,570.18 : 42,129.78 = 23,845.20 : x
2. Step 2: Convert to fraction form
   30,570.18/42,129.78 = 23,845.20/x
3. Step 3: Cross multiply
   30,570.18x = 42,129.78 × 23,845.20
4. Step 4: Simplify right side
   30,570.18x = 1,004,593,030.06
5. Step 5: Solve for x
   x = 1,004,593,030.06/30,570.18
6. Step 6: Final answer
   x = 32,861.86