Finding the Fourth Proportional to 99,078.63, 148,616.22 and 39,912.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,078.63 : 148,616.22 = 39,912.78 : x
2. Step 2: Convert to fraction form
   99,078.63/148,616.22 = 39,912.78/x
3. Step 3: Cross multiply
   99,078.63x = 148,616.22 × 39,912.78
4. Step 4: Simplify right side
   99,078.63x = 5,931,686,493.29
5. Step 5: Solve for x
   x = 5,931,686,493.29/99,078.63
6. Step 6: Final answer
   x = 59,868.48