Finding the Fourth Proportional to 338,759.67, 507,978.53 and 196,648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   338,759.67 : 507,978.53 = 196,648.50 : x
2. Step 2: Convert to fraction form
   338,759.67/507,978.53 = 196,648.50/x
3. Step 3: Cross multiply
   338,759.67x = 507,978.53 × 196,648.50
4. Step 4: Simplify right side
   338,759.67x = 99,893,215,956.71
5. Step 5: Solve for x
   x = 99,893,215,956.71/338,759.67
6. Step 6: Final answer
   x = 294,879.30