Finding the Fourth Proportional to 86,042, 129,067.86 and 30,638

Step by Step Solution

1. Step 1: Write the proportion equation
   86,042 : 129,067.86 = 30,638 : x
2. Step 2: Convert to fraction form
   86,042/129,067.86 = 30,638/x
3. Step 3: Cross multiply
   86,042x = 129,067.86 × 30,638
4. Step 4: Simplify right side
   86,042x = 3,954,381,094.68
5. Step 5: Solve for x
   x = 3,954,381,094.68/86,042
6. Step 6: Final answer
   x = 45,958.73