Finding the Fourth Proportional to 78,945.96, 108,945.45 and 42,647.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,945.96 : 108,945.45 = 42,647.42 : x
2. Step 2: Convert to fraction form
   78,945.96/108,945.45 = 42,647.42/x
3. Step 3: Cross multiply
   78,945.96x = 108,945.45 × 42,647.42
4. Step 4: Simplify right side
   78,945.96x = 4,646,241,711.89
5. Step 5: Solve for x
   x = 4,646,241,711.89/78,945.96
6. Step 6: Final answer
   x = 58,853.45