Finding the Fourth Proportional to 86,417.72, 129,626.41 and 33,790.29

Step by Step Solution

1. Step 1: Write the proportion equation
   86,417.72 : 129,626.41 = 33,790.29 : x
2. Step 2: Convert to fraction form
   86,417.72/129,626.41 = 33,790.29/x
3. Step 3: Cross multiply
   86,417.72x = 129,626.41 × 33,790.29
4. Step 4: Simplify right side
   86,417.72x = 4,380,113,985.56
5. Step 5: Solve for x
   x = 4,380,113,985.56/86,417.72
6. Step 6: Final answer
   x = 50,685.37