Finding the Fourth Proportional to 78,209.94, 107,929.83 and 42,399.94

Step by Step Solution

1. Step 1: Write the proportion equation
   78,209.94 : 107,929.83 = 42,399.94 : x
2. Step 2: Convert to fraction form
   78,209.94/107,929.83 = 42,399.94/x
3. Step 3: Cross multiply
   78,209.94x = 107,929.83 × 42,399.94
4. Step 4: Simplify right side
   78,209.94x = 4,576,218,316.21
5. Step 5: Solve for x
   x = 4,576,218,316.21/78,209.94
6. Step 6: Final answer
   x = 58,511.98