Finding the Fourth Proportional to 439,997.50, 607,196.55 and 238,793.50

Step by Step Solution

1. Step 1: Write the proportion equation
   439,997.50 : 607,196.55 = 238,793.50 : x
2. Step 2: Convert to fraction form
   439,997.50/607,196.55 = 238,793.50/x
3. Step 3: Cross multiply
   439,997.50x = 607,196.55 × 238,793.50
4. Step 4: Simplify right side
   439,997.50x = 144,994,589,362.43
5. Step 5: Solve for x
   x = 144,994,589,362.43/439,997.50
6. Step 6: Final answer
   x = 329,535.03