Finding the Fourth Proportional to 79,320.05, 118,977.34 and 31,920.47

Step by Step Solution

1. Step 1: Write the proportion equation
   79,320.05 : 118,977.34 = 31,920.47 : x
2. Step 2: Convert to fraction form
   79,320.05/118,977.34 = 31,920.47/x
3. Step 3: Cross multiply
   79,320.05x = 118,977.34 × 31,920.47
4. Step 4: Simplify right side
   79,320.05x = 3,797,812,612.15
5. Step 5: Solve for x
   x = 3,797,812,612.15/79,320.05
6. Step 6: Final answer
   x = 47,879.60