Finding the Fourth Proportional to 120,022.28, 165,644.82 and 72,299.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,022.28 : 165,644.82 = 72,299.72 : x
2. Step 2: Convert to fraction form
   120,022.28/165,644.82 = 72,299.72/x
3. Step 3: Cross multiply
   120,022.28x = 165,644.82 × 72,299.72
4. Step 4: Simplify right side
   120,022.28x = 11,976,074,105.45
5. Step 5: Solve for x
   x = 11,976,074,105.45/120,022.28
6. Step 6: Final answer
   x = 99,782.09