Finding the Fourth Proportional to 439,909.50, 607,075.52 and 238,705.50

Step by Step Solution

1. Step 1: Write the proportion equation
   439,909.50 : 607,075.52 = 238,705.50 : x
2. Step 2: Convert to fraction form
   439,909.50/607,075.52 = 238,705.50/x
3. Step 3: Cross multiply
   439,909.50x = 607,075.52 × 238,705.50
4. Step 4: Simplify right side
   439,909.50x = 144,912,264,345.83
5. Step 5: Solve for x
   x = 144,912,264,345.83/439,909.50
6. Step 6: Final answer
   x = 329,413.81