Finding the Fourth Proportional to 72,079.60, 108,103.20 and 47,293.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,079.60 : 108,103.20 = 47,293.60 : x
2. Step 2: Convert to fraction form
   72,079.60/108,103.20 = 47,293.60/x
3. Step 3: Cross multiply
   72,079.60x = 108,103.20 × 47,293.60
4. Step 4: Simplify right side
   72,079.60x = 5,112,589,499.52
5. Step 5: Solve for x
   x = 5,112,589,499.52/72,079.60
6. Step 6: Final answer
   x = 70,929.77