Finding the Fourth Proportional to 72,554.22, 108,859.32 and 28,212.21

Step by Step Solution

1. Step 1: Write the proportion equation
   72,554.22 : 108,859.32 = 28,212.21 : x
2. Step 2: Convert to fraction form
   72,554.22/108,859.32 = 28,212.21/x
3. Step 3: Cross multiply
   72,554.22x = 108,859.32 × 28,212.21
4. Step 4: Simplify right side
   72,554.22x = 3,071,161,996.30
5. Step 5: Solve for x
   x = 3,071,161,996.30/72,554.22
6. Step 6: Final answer
   x = 42,329.20