Finding the Fourth Proportional to 78,678.33, 108,574.72 and 42,868.63

Step by Step Solution

1. Step 1: Write the proportion equation
   78,678.33 : 108,574.72 = 42,868.63 : x
2. Step 2: Convert to fraction form
   78,678.33/108,574.72 = 42,868.63/x
3. Step 3: Cross multiply
   78,678.33x = 108,574.72 × 42,868.63
4. Step 4: Simplify right side
   78,678.33x = 4,654,449,768.72
5. Step 5: Solve for x
   x = 4,654,449,768.72/78,678.33
6. Step 6: Final answer
   x = 59,157.97