Finding the Fourth Proportional to 78,049.72, 107,708.22 and 42,239.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,049.72 : 107,708.22 = 42,239.74 : x
2. Step 2: Convert to fraction form
   78,049.72/107,708.22 = 42,239.74/x
3. Step 3: Cross multiply
   78,049.72x = 107,708.22 × 42,239.74
4. Step 4: Simplify right side
   78,049.72x = 4,549,567,208.66
5. Step 5: Solve for x
   x = 4,549,567,208.66/78,049.72
6. Step 6: Final answer
   x = 58,290.63