Finding the Fourth Proportional to 113,857.98, 170,805.33 and 42,786.15

Step by Step Solution

1. Step 1: Write the proportion equation
   113,857.98 : 170,805.33 = 42,786.15 : x
2. Step 2: Convert to fraction form
   113,857.98/170,805.33 = 42,786.15/x
3. Step 3: Cross multiply
   113,857.98x = 170,805.33 × 42,786.15
4. Step 4: Simplify right side
   113,857.98x = 7,308,102,470.18
5. Step 5: Solve for x
   x = 7,308,102,470.18/113,857.98
6. Step 6: Final answer
   x = 64,186.12