Finding the Fourth Proportional to 111,581.33, 153,905.81 and 71,277.20

Step by Step Solution

1. Step 1: Write the proportion equation
   111,581.33 : 153,905.81 = 71,277.20 : x
2. Step 2: Convert to fraction form
   111,581.33/153,905.81 = 71,277.20/x
3. Step 3: Cross multiply
   111,581.33x = 153,905.81 × 71,277.20
4. Step 4: Simplify right side
   111,581.33x = 10,969,974,609.20
5. Step 5: Solve for x
   x = 10,969,974,609.20/111,581.33
6. Step 6: Final answer
   x = 98,313.71