Finding the Fourth Proportional to 83,499.45, 125,249.43 and 20,319.59

Step by Step Solution

1. Step 1: Write the proportion equation
   83,499.45 : 125,249.43 = 20,319.59 : x
2. Step 2: Convert to fraction form
   83,499.45/125,249.43 = 20,319.59/x
3. Step 3: Cross multiply
   83,499.45x = 125,249.43 × 20,319.59
4. Step 4: Simplify right side
   83,499.45x = 2,545,016,489.89
5. Step 5: Solve for x
   x = 2,545,016,489.89/83,499.45
6. Step 6: Final answer
   x = 30,479.44