Finding the Fourth Proportional to 78,704.38, 108,610.56 and 42,894.64

Step by Step Solution

1. Step 1: Write the proportion equation
   78,704.38 : 108,610.56 = 42,894.64 : x
2. Step 2: Convert to fraction form
   78,704.38/108,610.56 = 42,894.64/x
3. Step 3: Cross multiply
   78,704.38x = 108,610.56 × 42,894.64
4. Step 4: Simplify right side
   78,704.38x = 4,658,810,871.40
5. Step 5: Solve for x
   x = 4,658,810,871.40/78,704.38
6. Step 6: Final answer
   x = 59,193.79