Finding the Fourth Proportional to 79,506.74, 119,259.50 and 20,342.31

Step by Step Solution

1. Step 1: Write the proportion equation
   79,506.74 : 119,259.50 = 20,342.31 : x
2. Step 2: Convert to fraction form
   79,506.74/119,259.50 = 20,342.31/x
3. Step 3: Cross multiply
   79,506.74x = 119,259.50 × 20,342.31
4. Step 4: Simplify right side
   79,506.74x = 2,426,013,617.73
5. Step 5: Solve for x
   x = 2,426,013,617.73/79,506.74
6. Step 6: Final answer
   x = 30,513.31