Finding the Fourth Proportional to 113,612.27, 170,607.31 and 71,016.35

Step by Step Solution

1. Step 1: Write the proportion equation
   113,612.27 : 170,607.31 = 71,016.35 : x
2. Step 2: Convert to fraction form
   113,612.27/170,607.31 = 71,016.35/x
3. Step 3: Cross multiply
   113,612.27x = 170,607.31 × 71,016.35
4. Step 4: Simplify right side
   113,612.27x = 12,115,907,408.94
5. Step 5: Solve for x
   x = 12,115,907,408.94/113,612.27
6. Step 6: Final answer
   x = 106,642.60