Finding the Fourth Proportional to 72,632.96, 108,921.36 and 28,253.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,632.96 : 108,921.36 = 28,253.72 : x
2. Step 2: Convert to fraction form
   72,632.96/108,921.36 = 28,253.72/x
3. Step 3: Cross multiply
   72,632.96x = 108,921.36 × 28,253.72
4. Step 4: Simplify right side
   72,632.96x = 3,077,433,607.46
5. Step 5: Solve for x
   x = 3,077,433,607.46/72,632.96
6. Step 6: Final answer
   x = 42,369.66