Finding the Fourth Proportional to 147,978.56, 204,211.20 and 80,910.56

Step by Step Solution

1. Step 1: Write the proportion equation
   147,978.56 : 204,211.20 = 80,910.56 : x
2. Step 2: Convert to fraction form
   147,978.56/204,211.20 = 80,910.56/x
3. Step 3: Cross multiply
   147,978.56x = 204,211.20 × 80,910.56
4. Step 4: Simplify right side
   147,978.56x = 16,522,842,550.27
5. Step 5: Solve for x
   x = 16,522,842,550.27/147,978.56
6. Step 6: Final answer
   x = 111,657.00