Finding the Fourth Proportional to 79,817.92, 119,761.68 and 42,838.72

Step by Step Solution

1. Step 1: Write the proportion equation
   79,817.92 : 119,761.68 = 42,838.72 : x
2. Step 2: Convert to fraction form
   79,817.92/119,761.68 = 42,838.72/x
3. Step 3: Cross multiply
   79,817.92x = 119,761.68 × 42,838.72
4. Step 4: Simplify right side
   79,817.92x = 5,130,437,076.25
5. Step 5: Solve for x
   x = 5,130,437,076.25/79,817.92
6. Step 6: Final answer
   x = 64,276.76