Finding the Fourth Proportional to 113,706.76, 156,958.56 and 85,494.40

Step by Step Solution

1. Step 1: Write the proportion equation
   113,706.76 : 156,958.56 = 85,494.40 : x
2. Step 2: Convert to fraction form
   113,706.76/156,958.56 = 85,494.40/x
3. Step 3: Cross multiply
   113,706.76x = 156,958.56 × 85,494.40
4. Step 4: Simplify right side
   113,706.76x = 13,419,077,912.06
5. Step 5: Solve for x
   x = 13,419,077,912.06/113,706.76
6. Step 6: Final answer
   x = 118,014.78