Finding the Fourth Proportional to 439,867, 607,019.70 and 238,663

Step by Step Solution

1. Step 1: Write the proportion equation
   439,867 : 607,019.70 = 238,663 : x
2. Step 2: Convert to fraction form
   439,867/607,019.70 = 238,663/x
3. Step 3: Cross multiply
   439,867x = 607,019.70 × 238,663
4. Step 4: Simplify right side
   439,867x = 144,873,142,661.10
5. Step 5: Solve for x
   x = 144,873,142,661.10/439,867
6. Step 6: Final answer
   x = 329,356.70