Finding the Fourth Proportional to 78,339.08, 108,107.33 and 42,528.38

Step by Step Solution

1. Step 1: Write the proportion equation
   78,339.08 : 108,107.33 = 42,528.38 : x
2. Step 2: Convert to fraction form
   78,339.08/108,107.33 = 42,528.38/x
3. Step 3: Cross multiply
   78,339.08x = 108,107.33 × 42,528.38
4. Step 4: Simplify right side
   78,339.08x = 4,597,628,857.85
5. Step 5: Solve for x
   x = 4,597,628,857.85/78,339.08
6. Step 6: Final answer
   x = 58,688.83