Finding the Fourth Proportional to 279,870.96, 419,848.56 and 99,942.42

Step by Step Solution

1. Step 1: Write the proportion equation
   279,870.96 : 419,848.56 = 99,942.42 : x
2. Step 2: Convert to fraction form
   279,870.96/419,848.56 = 99,942.42/x
3. Step 3: Cross multiply
   279,870.96x = 419,848.56 × 99,942.42
4. Step 4: Simplify right side
   279,870.96x = 41,960,681,119.92
5. Step 5: Solve for x
   x = 41,960,681,119.92/279,870.96
6. Step 6: Final answer
   x = 149,928.67