Finding the Fourth Proportional to 111,556.40, 153,890.72 and 71,227.76

Step by Step Solution

1. Step 1: Write the proportion equation
   111,556.40 : 153,890.72 = 71,227.76 : x
2. Step 2: Convert to fraction form
   111,556.40/153,890.72 = 71,227.76/x
3. Step 3: Cross multiply
   111,556.40x = 153,890.72 × 71,227.76
4. Step 4: Simplify right side
   111,556.40x = 10,961,291,270.39
5. Step 5: Solve for x
   x = 10,961,291,270.39/111,556.40
6. Step 6: Final answer
   x = 98,257.84