Finding the Fourth Proportional to 78,009.57, 107,653.12 and 42,199.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,009.57 : 107,653.12 = 42,199.49 : x
2. Step 2: Convert to fraction form
   78,009.57/107,653.12 = 42,199.49/x
3. Step 3: Cross multiply
   78,009.57x = 107,653.12 × 42,199.49
4. Step 4: Simplify right side
   78,009.57x = 4,542,906,924.54
5. Step 5: Solve for x
   x = 4,542,906,924.54/78,009.57
6. Step 6: Final answer
   x = 58,235.25