Finding the Fourth Proportional to 99,041.78, 148,606.41 and 39,992.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,041.78 : 148,606.41 = 39,992.78 : x
2. Step 2: Convert to fraction form
   99,041.78/148,606.41 = 39,992.78/x
3. Step 3: Cross multiply
   99,041.78x = 148,606.41 × 39,992.78
4. Step 4: Simplify right side
   99,041.78x = 5,943,183,461.72
5. Step 5: Solve for x
   x = 5,943,183,461.72/99,041.78
6. Step 6: Final answer
   x = 60,006.83