Finding the Fourth Proportional to 78,675.28, 108,573.12 and 42,865.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,675.28 : 108,573.12 = 42,865.28 : x
2. Step 2: Convert to fraction form
   78,675.28/108,573.12 = 42,865.28/x
3. Step 3: Cross multiply
   78,675.28x = 108,573.12 × 42,865.28
4. Step 4: Simplify right side
   78,675.28x = 4,654,017,189.27
5. Step 5: Solve for x
   x = 4,654,017,189.27/78,675.28
6. Step 6: Final answer
   x = 59,154.76