Finding the Fourth Proportional to 116,012.36, 160,091.70 and 65,711.72

Step by Step Solution

1. Step 1: Write the proportion equation
   116,012.36 : 160,091.70 = 65,711.72 : x
2. Step 2: Convert to fraction form
   116,012.36/160,091.70 = 65,711.72/x
3. Step 3: Cross multiply
   116,012.36x = 160,091.70 × 65,711.72
4. Step 4: Simplify right side
   116,012.36x = 10,519,900,964.72
5. Step 5: Solve for x
   x = 10,519,900,964.72/116,012.36
6. Step 6: Final answer
   x = 90,679.14