Finding the Fourth Proportional to 72,469.55, 108,735.62 and 39,213.05

Step by Step Solution

1. Step 1: Write the proportion equation
   72,469.55 : 108,735.62 = 39,213.05 : x
2. Step 2: Convert to fraction form
   72,469.55/108,735.62 = 39,213.05/x
3. Step 3: Cross multiply
   72,469.55x = 108,735.62 × 39,213.05
4. Step 4: Simplify right side
   72,469.55x = 4,263,854,564.10
5. Step 5: Solve for x
   x = 4,263,854,564.10/72,469.55
6. Step 6: Final answer
   x = 58,836.50