Finding the Fourth Proportional to 78,077.76, 107,747.28 and 42,267.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,077.76 : 107,747.28 = 42,267.74 : x
2. Step 2: Convert to fraction form
   78,077.76/107,747.28 = 42,267.74/x
3. Step 3: Cross multiply
   78,077.76x = 107,747.28 × 42,267.74
4. Step 4: Simplify right side
   78,077.76x = 4,554,234,016.75
5. Step 5: Solve for x
   x = 4,554,234,016.75/78,077.76
6. Step 6: Final answer
   x = 58,329.47