Finding the Fourth Proportional to 67,191.70, 100,820.34 and 42,243.48

Step by Step Solution

1. Step 1: Write the proportion equation
   67,191.70 : 100,820.34 = 42,243.48 : x
2. Step 2: Convert to fraction form
   67,191.70/100,820.34 = 42,243.48/x
3. Step 3: Cross multiply
   67,191.70x = 100,820.34 × 42,243.48
4. Step 4: Simplify right side
   67,191.70x = 4,259,002,016.38
5. Step 5: Solve for x
   x = 4,259,002,016.38/67,191.70
6. Step 6: Final answer
   x = 63,385.84