Finding the Fourth Proportional to 198,441.72, 297,875.88 and 80,190.72

Step by Step Solution

1. Step 1: Write the proportion equation
   198,441.72 : 297,875.88 = 80,190.72 : x
2. Step 2: Convert to fraction form
   198,441.72/297,875.88 = 80,190.72/x
3. Step 3: Cross multiply
   198,441.72x = 297,875.88 × 80,190.72
4. Step 4: Simplify right side
   198,441.72x = 23,886,881,287.83
5. Step 5: Solve for x
   x = 23,886,881,287.83/198,441.72
6. Step 6: Final answer
   x = 120,372.27