Finding the Fourth Proportional to 111,727.57, 154,166.72 and 66,388.69

Step by Step Solution

1. Step 1: Write the proportion equation
   111,727.57 : 154,166.72 = 66,388.69 : x
2. Step 2: Convert to fraction form
   111,727.57/154,166.72 = 66,388.69/x
3. Step 3: Cross multiply
   111,727.57x = 154,166.72 × 66,388.69
4. Step 4: Simplify right side
   111,727.57x = 10,234,926,250.45
5. Step 5: Solve for x
   x = 10,234,926,250.45/111,727.57
6. Step 6: Final answer
   x = 91,606.09