Finding the Fourth Proportional to 116,698.56, 174,633.12 and 85,456.32

Step by Step Solution

1. Step 1: Write the proportion equation
   116,698.56 : 174,633.12 = 85,456.32 : x
2. Step 2: Convert to fraction form
   116,698.56/174,633.12 = 85,456.32/x
3. Step 3: Cross multiply
   116,698.56x = 174,633.12 × 85,456.32
4. Step 4: Simplify right side
   116,698.56x = 14,923,503,785.32
5. Step 5: Solve for x
   x = 14,923,503,785.32/116,698.56
6. Step 6: Final answer
   x = 127,880.79