Finding the Fourth Proportional to 72,496.95, 108,732.90 and 19,189.29

Step by Step Solution

1. Step 1: Write the proportion equation
   72,496.95 : 108,732.90 = 19,189.29 : x
2. Step 2: Convert to fraction form
   72,496.95/108,732.90 = 19,189.29/x
3. Step 3: Cross multiply
   72,496.95x = 108,732.90 × 19,189.29
4. Step 4: Simplify right side
   72,496.95x = 2,086,507,150.64
5. Step 5: Solve for x
   x = 2,086,507,150.64/72,496.95
6. Step 6: Final answer
   x = 28,780.62