Finding the Fourth Proportional to 73,936.80, 102,033.72 and 42,105.78

Step by Step Solution

1. Step 1: Write the proportion equation
   73,936.80 : 102,033.72 = 42,105.78 : x
2. Step 2: Convert to fraction form
   73,936.80/102,033.72 = 42,105.78/x
3. Step 3: Cross multiply
   73,936.80x = 102,033.72 × 42,105.78
4. Step 4: Simplify right side
   73,936.80x = 4,296,209,366.90
5. Step 5: Solve for x
   x = 4,296,209,366.90/73,936.80
6. Step 6: Final answer
   x = 58,106.51