Finding the Fourth Proportional to 30,675.62, 42,407.82 and 30,394.95

Step by Step Solution

1. Step 1: Write the proportion equation
   30,675.62 : 42,407.82 = 30,394.95 : x
2. Step 2: Convert to fraction form
   30,675.62/42,407.82 = 30,394.95/x
3. Step 3: Cross multiply
   30,675.62x = 42,407.82 × 30,394.95
4. Step 4: Simplify right side
   30,675.62x = 1,288,983,568.51
5. Step 5: Solve for x
   x = 1,288,983,568.51/30,675.62
6. Step 6: Final answer
   x = 42,019.81