Finding the Fourth Proportional to 72,509.48, 108,803.84 and 28,137.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,509.48 : 108,803.84 = 28,137.96 : x
2. Step 2: Convert to fraction form
   72,509.48/108,803.84 = 28,137.96/x
3. Step 3: Cross multiply
   72,509.48x = 108,803.84 × 28,137.96
4. Step 4: Simplify right side
   72,509.48x = 3,061,518,097.77
5. Step 5: Solve for x
   x = 3,061,518,097.77/72,509.48
6. Step 6: Final answer
   x = 42,222.31