Finding the Fourth Proportional to 78,570.63, 108,425.39 and 42,759.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,570.63 : 108,425.39 = 42,759.87 : x
2. Step 2: Convert to fraction form
   78,570.63/108,425.39 = 42,759.87/x
3. Step 3: Cross multiply
   78,570.63x = 108,425.39 × 42,759.87
4. Step 4: Simplify right side
   78,570.63x = 4,636,255,581.10
5. Step 5: Solve for x
   x = 4,636,255,581.10/78,570.63
6. Step 6: Final answer
   x = 59,007.49