Finding the Fourth Proportional to 72,391.30, 108,522.15 and 47,443.30

Step by Step Solution

1. Step 1: Write the proportion equation
   72,391.30 : 108,522.15 = 47,443.30 : x
2. Step 2: Convert to fraction form
   72,391.30/108,522.15 = 47,443.30/x
3. Step 3: Cross multiply
   72,391.30x = 108,522.15 × 47,443.30
4. Step 4: Simplify right side
   72,391.30x = 5,148,648,919.10
5. Step 5: Solve for x
   x = 5,148,648,919.10/72,391.30
6. Step 6: Final answer
   x = 71,122.48