Finding the Fourth Proportional to 72,016, 108,023.68 and 19,430.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,016 : 108,023.68 = 19,430.72 : x
2. Step 2: Convert to fraction form
   72,016/108,023.68 = 19,430.72/x
3. Step 3: Cross multiply
   72,016x = 108,023.68 × 19,430.72
4. Step 4: Simplify right side
   72,016x = 2,098,977,879.45
5. Step 5: Solve for x
   x = 2,098,977,879.45/72,016
6. Step 6: Final answer
   x = 29,145.99