Finding the Fourth Proportional to 78,072.41, 107,739.99 and 42,262.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,072.41 : 107,739.99 = 42,262.31 : x
2. Step 2: Convert to fraction form
   78,072.41/107,739.99 = 42,262.31/x
3. Step 3: Cross multiply
   78,072.41x = 107,739.99 × 42,262.31
4. Step 4: Simplify right side
   78,072.41x = 4,553,340,856.78
5. Step 5: Solve for x
   x = 4,553,340,856.78/78,072.41
6. Step 6: Final answer
   x = 58,322.02