Finding the Fourth Proportional to 111,719.79, 154,164.12 and 65,772.14

Step by Step Solution

1. Step 1: Write the proportion equation
   111,719.79 : 154,164.12 = 65,772.14 : x
2. Step 2: Convert to fraction form
   111,719.79/154,164.12 = 65,772.14/x
3. Step 3: Cross multiply
   111,719.79x = 154,164.12 × 65,772.14
4. Step 4: Simplify right side
   111,719.79x = 10,139,703,312.80
5. Step 5: Solve for x
   x = 10,139,703,312.80/111,719.79
6. Step 6: Final answer
   x = 90,760.14