Finding the Fourth Proportional to 72,391.69, 108,710.86 and 47,134.23

Step by Step Solution

1. Step 1: Write the proportion equation
   72,391.69 : 108,710.86 = 47,134.23 : x
2. Step 2: Convert to fraction form
   72,391.69/108,710.86 = 47,134.23/x
3. Step 3: Cross multiply
   72,391.69x = 108,710.86 × 47,134.23
4. Step 4: Simplify right side
   72,391.69x = 5,124,002,017.35
5. Step 5: Solve for x
   x = 5,124,002,017.35/72,391.69
6. Step 6: Final answer
   x = 70,781.63