Finding the Fourth Proportional to 99,043.78, 148,609.42 and 39,994.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,043.78 : 148,609.42 = 39,994.78 : x
2. Step 2: Convert to fraction form
   99,043.78/148,609.42 = 39,994.78/x
3. Step 3: Cross multiply
   99,043.78x = 148,609.42 × 39,994.78
4. Step 4: Simplify right side
   99,043.78x = 5,943,601,058.83
5. Step 5: Solve for x
   x = 5,943,601,058.83/99,043.78
6. Step 6: Final answer
   x = 60,009.84