Finding the Fourth Proportional to 72,339.37, 99,819.34 and 40,503.13

Step by Step Solution

1. Step 1: Write the proportion equation
   72,339.37 : 99,819.34 = 40,503.13 : x
2. Step 2: Convert to fraction form
   72,339.37/99,819.34 = 40,503.13/x
3. Step 3: Cross multiply
   72,339.37x = 99,819.34 × 40,503.13
4. Step 4: Simplify right side
   72,339.37x = 4,042,995,704.53
5. Step 5: Solve for x
   x = 4,042,995,704.53/72,339.37
6. Step 6: Final answer
   x = 55,889.29