Finding the Fourth Proportional to 147,978.31, 204,210.86 and 80,910.31

Step by Step Solution

1. Step 1: Write the proportion equation
   147,978.31 : 204,210.86 = 80,910.31 : x
2. Step 2: Convert to fraction form
   147,978.31/204,210.86 = 80,910.31/x
3. Step 3: Cross multiply
   147,978.31x = 204,210.86 × 80,910.31
4. Step 4: Simplify right side
   147,978.31x = 16,522,763,583.42
5. Step 5: Solve for x
   x = 16,522,763,583.42/147,978.31
6. Step 6: Final answer
   x = 111,656.66