Finding the Fourth Proportional to 81,978.06, 122,942.79 and 35,220

Step by Step Solution

1. Step 1: Write the proportion equation
   81,978.06 : 122,942.79 = 35,220 : x
2. Step 2: Convert to fraction form
   81,978.06/122,942.79 = 35,220/x
3. Step 3: Cross multiply
   81,978.06x = 122,942.79 × 35,220
4. Step 4: Simplify right side
   81,978.06x = 4,330,045,063.80
5. Step 5: Solve for x
   x = 4,330,045,063.80/81,978.06
6. Step 6: Final answer
   x = 52,819.56