Finding the Fourth Proportional to 72,158,162.42, 108,225,721.92 and 21,028,221.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,158,162.42 : 108,225,721.92 = 21,028,221.38 : x
2. Step 2: Convert to fraction form
   72,158,162.42/108,225,721.92 = 21,028,221.38/x
3. Step 3: Cross multiply
   72,158,162.42x = 108,225,721.92 × 21,028,221.38
4. Step 4: Simplify right side
   72,158,162.42x = 2,275,794,439,544,078.50
5. Step 5: Solve for x
   x = 2,275,794,439,544,078.50/72,158,162.42
6. Step 6: Final answer
   x = 31,538,974.43