Finding the Fourth Proportional to 113,431.43, 170,134.15 and 30,331.91

Step by Step Solution

1. Step 1: Write the proportion equation
   113,431.43 : 170,134.15 = 30,331.91 : x
2. Step 2: Convert to fraction form
   113,431.43/170,134.15 = 30,331.91/x
3. Step 3: Cross multiply
   113,431.43x = 170,134.15 × 30,331.91
4. Step 4: Simplify right side
   113,431.43x = 5,160,493,725.73
5. Step 5: Solve for x
   x = 5,160,493,725.73/113,431.43
6. Step 6: Final answer
   x = 45,494.39