Finding the Fourth Proportional to 198,582.56, 297,870.72 and 72,221.12

Step by Step Solution

1. Step 1: Write the proportion equation
   198,582.56 : 297,870.72 = 72,221.12 : x
2. Step 2: Convert to fraction form
   198,582.56/297,870.72 = 72,221.12/x
3. Step 3: Cross multiply
   198,582.56x = 297,870.72 × 72,221.12
4. Step 4: Simplify right side
   198,582.56x = 21,512,557,013.61
5. Step 5: Solve for x
   x = 21,512,557,013.61/198,582.56
6. Step 6: Final answer
   x = 108,330.55