Finding the Fourth Proportional to 78,249.59, 107,984.49 and 42,439.59

Step by Step Solution

1. Step 1: Write the proportion equation
   78,249.59 : 107,984.49 = 42,439.59 : x
2. Step 2: Convert to fraction form
   78,249.59/107,984.49 = 42,439.59/x
3. Step 3: Cross multiply
   78,249.59x = 107,984.49 × 42,439.59
4. Step 4: Simplify right side
   78,249.59x = 4,582,817,481.96
5. Step 5: Solve for x
   x = 4,582,817,481.96/78,249.59
6. Step 6: Final answer
   x = 58,566.66