Finding the Fourth Proportional to 79,159.50, 109,238.78 and 42,860.63

Step by Step Solution

1. Step 1: Write the proportion equation
   79,159.50 : 109,238.78 = 42,860.63 : x
2. Step 2: Convert to fraction form
   79,159.50/109,238.78 = 42,860.63/x
3. Step 3: Cross multiply
   79,159.50x = 109,238.78 × 42,860.63
4. Step 4: Simplify right side
   79,159.50x = 4,682,043,311.48
5. Step 5: Solve for x
   x = 4,682,043,311.48/79,159.50
6. Step 6: Final answer
   x = 59,146.95