Finding the Fourth Proportional to 78,649.38, 108,573.48 and 50,371.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,649.38 : 108,573.48 = 50,371.74 : x
2. Step 2: Convert to fraction form
   78,649.38/108,573.48 = 50,371.74/x
3. Step 3: Cross multiply
   78,649.38x = 108,573.48 × 50,371.74
4. Step 4: Simplify right side
   78,649.38x = 5,469,035,105.46
5. Step 5: Solve for x
   x = 5,469,035,105.46/78,649.38
6. Step 6: Final answer
   x = 69,536.91