Finding the Fourth Proportional to 78,083.40, 107,753.79 and 42,273.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,083.40 : 107,753.79 = 42,273.12 : x
2. Step 2: Convert to fraction form
   78,083.40/107,753.79 = 42,273.12/x
3. Step 3: Cross multiply
   78,083.40x = 107,753.79 × 42,273.12
4. Step 4: Simplify right side
   78,083.40x = 4,555,088,895.12
5. Step 5: Solve for x
   x = 4,555,088,895.12/78,083.40
6. Step 6: Final answer
   x = 58,336.20