Finding the Fourth Proportional to 111,071.89, 153,216.89 and 68,072.21

Step by Step Solution

1. Step 1: Write the proportion equation
   111,071.89 : 153,216.89 = 68,072.21 : x
2. Step 2: Convert to fraction form
   111,071.89/153,216.89 = 68,072.21/x
3. Step 3: Cross multiply
   111,071.89x = 153,216.89 × 68,072.21
4. Step 4: Simplify right side
   111,071.89x = 10,429,811,545.54
5. Step 5: Solve for x
   x = 10,429,811,545.54/111,071.89
6. Step 6: Final answer
   x = 93,901.45