Finding the Fourth Proportional to 72,306.72, 108,445.50 and 19,709.37

Step by Step Solution

1. Step 1: Write the proportion equation
   72,306.72 : 108,445.50 = 19,709.37 : x
2. Step 2: Convert to fraction form
   72,306.72/108,445.50 = 19,709.37/x
3. Step 3: Cross multiply
   72,306.72x = 108,445.50 × 19,709.37
4. Step 4: Simplify right side
   72,306.72x = 2,137,392,484.34
5. Step 5: Solve for x
   x = 2,137,392,484.34/72,306.72
6. Step 6: Final answer
   x = 29,560.08