Finding the Fourth Proportional to 115,016.80, 158,722.86 and 64,715.80

Step by Step Solution

1. Step 1: Write the proportion equation
   115,016.80 : 158,722.86 = 64,715.80 : x
2. Step 2: Convert to fraction form
   115,016.80/158,722.86 = 64,715.80/x
3. Step 3: Cross multiply
   115,016.80x = 158,722.86 × 64,715.80
4. Step 4: Simplify right side
   115,016.80x = 10,271,876,863.19
5. Step 5: Solve for x
   x = 10,271,876,863.19/115,016.80
6. Step 6: Final answer
   x = 89,307.62