Finding the Fourth Proportional to 30,626.28, 42,233.18 and 28,840.43

Step by Step Solution

1. Step 1: Write the proportion equation
   30,626.28 : 42,233.18 = 28,840.43 : x
2. Step 2: Convert to fraction form
   30,626.28/42,233.18 = 28,840.43/x
3. Step 3: Cross multiply
   30,626.28x = 42,233.18 × 28,840.43
4. Step 4: Simplify right side
   30,626.28x = 1,218,022,716.10
5. Step 5: Solve for x
   x = 1,218,022,716.10/30,626.28
6. Step 6: Final answer
   x = 39,770.51