Finding the Fourth Proportional to 78,309.43, 108,067.10 and 42,499.46

Step by Step Solution

1. Step 1: Write the proportion equation
   78,309.43 : 108,067.10 = 42,499.46 : x
2. Step 2: Convert to fraction form
   78,309.43/108,067.10 = 42,499.46/x
3. Step 3: Cross multiply
   78,309.43x = 108,067.10 × 42,499.46
4. Step 4: Simplify right side
   78,309.43x = 4,592,793,451.44
5. Step 5: Solve for x
   x = 4,592,793,451.44/78,309.43
6. Step 6: Final answer
   x = 58,649.30