Finding the Fourth Proportional to 115,016.76, 158,723.01 and 64,715.76

Step by Step Solution

1. Step 1: Write the proportion equation
   115,016.76 : 158,723.01 = 64,715.76 : x
2. Step 2: Convert to fraction form
   115,016.76/158,723.01 = 64,715.76/x
3. Step 3: Cross multiply
   115,016.76x = 158,723.01 × 64,715.76
4. Step 4: Simplify right side
   115,016.76x = 10,271,880,221.64
5. Step 5: Solve for x
   x = 10,271,880,221.64/115,016.76
6. Step 6: Final answer
   x = 89,307.68