Finding the Fourth Proportional to 78,131.92, 107,821.44 and 42,321.52

Step by Step Solution

1. Step 1: Write the proportion equation
   78,131.92 : 107,821.44 = 42,321.52 : x
2. Step 2: Convert to fraction form
   78,131.92/107,821.44 = 42,321.52/x
3. Step 3: Cross multiply
   78,131.92x = 107,821.44 × 42,321.52
4. Step 4: Simplify right side
   78,131.92x = 4,563,167,229.39
5. Step 5: Solve for x
   x = 4,563,167,229.39/78,131.92
6. Step 6: Final answer
   x = 58,403.37