Finding the Fourth Proportional to 79,209.57, 109,406.31 and 64,119.27

Step by Step Solution

1. Step 1: Write the proportion equation
   79,209.57 : 109,406.31 = 64,119.27 : x
2. Step 2: Convert to fraction form
   79,209.57/109,406.31 = 64,119.27/x
3. Step 3: Cross multiply
   79,209.57x = 109,406.31 × 64,119.27
4. Step 4: Simplify right side
   79,209.57x = 7,015,052,730.59
5. Step 5: Solve for x
   x = 7,015,052,730.59/79,209.57
6. Step 6: Final answer
   x = 88,563.20