Finding the Fourth Proportional to 78,226.56, 107,951.59 and 42,415.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,226.56 : 107,951.59 = 42,415.80 : x
2. Step 2: Convert to fraction form
   78,226.56/107,951.59 = 42,415.80/x
3. Step 3: Cross multiply
   78,226.56x = 107,951.59 × 42,415.80
4. Step 4: Simplify right side
   78,226.56x = 4,578,853,067.96
5. Step 5: Solve for x
   x = 4,578,853,067.96/78,226.56
6. Step 6: Final answer
   x = 58,533.23