Finding the Fourth Proportional to 78,338.48, 108,107.34 and 42,528.54

Step by Step Solution

1. Step 1: Write the proportion equation
   78,338.48 : 108,107.34 = 42,528.54 : x
2. Step 2: Convert to fraction form
   78,338.48/108,107.34 = 42,528.54/x
3. Step 3: Cross multiply
   78,338.48x = 108,107.34 × 42,528.54
4. Step 4: Simplify right side
   78,338.48x = 4,597,647,333.48
5. Step 5: Solve for x
   x = 4,597,647,333.48/78,338.48
6. Step 6: Final answer
   x = 58,689.51