Finding the Fourth Proportional to 198,978.76, 274,584.21 and 112,944.61

Step by Step Solution

1. Step 1: Write the proportion equation
   198,978.76 : 274,584.21 = 112,944.61 : x
2. Step 2: Convert to fraction form
   198,978.76/274,584.21 = 112,944.61/x
3. Step 3: Cross multiply
   198,978.76x = 274,584.21 × 112,944.61
4. Step 4: Simplify right side
   198,978.76x = 31,012,806,510.61
5. Step 5: Solve for x
   x = 31,012,806,510.61/198,978.76
6. Step 6: Final answer
   x = 155,859.88