Finding the Fourth Proportional to 107,978.67, 149,013.72 and 60,231

Step by Step Solution

1. Step 1: Write the proportion equation
   107,978.67 : 149,013.72 = 60,231 : x
2. Step 2: Convert to fraction form
   107,978.67/149,013.72 = 60,231/x
3. Step 3: Cross multiply
   107,978.67x = 149,013.72 × 60,231
4. Step 4: Simplify right side
   107,978.67x = 8,975,245,369.32
5. Step 5: Solve for x
   x = 8,975,245,369.32/107,978.67
6. Step 6: Final answer
   x = 83,120.54