Finding the Fourth Proportional to 439,830.72, 606,967.56 and 238,626.72

Step by Step Solution

1. Step 1: Write the proportion equation
   439,830.72 : 606,967.56 = 238,626.72 : x
2. Step 2: Convert to fraction form
   439,830.72/606,967.56 = 238,626.72/x
3. Step 3: Cross multiply
   439,830.72x = 606,967.56 × 238,626.72
4. Step 4: Simplify right side
   439,830.72x = 144,838,677,989.20
5. Step 5: Solve for x
   x = 144,838,677,989.20/439,830.72
6. Step 6: Final answer
   x = 329,305.51