Finding the Fourth Proportional to 72,663.15, 108,950.12 and 28,238.03

Step by Step Solution

1. Step 1: Write the proportion equation
   72,663.15 : 108,950.12 = 28,238.03 : x
2. Step 2: Convert to fraction form
   72,663.15/108,950.12 = 28,238.03/x
3. Step 3: Cross multiply
   72,663.15x = 108,950.12 × 28,238.03
4. Step 4: Simplify right side
   72,663.15x = 3,076,536,757.06
5. Step 5: Solve for x
   x = 3,076,536,757.06/72,663.15
6. Step 6: Final answer
   x = 42,339.71