Finding the Fourth Proportional to 439,905, 607,068.90 and 238,701

Step by Step Solution

1. Step 1: Write the proportion equation
   439,905 : 607,068.90 = 238,701 : x
2. Step 2: Convert to fraction form
   439,905/607,068.90 = 238,701/x
3. Step 3: Cross multiply
   439,905x = 607,068.90 × 238,701
4. Step 4: Simplify right side
   439,905x = 144,907,953,498.90
5. Step 5: Solve for x
   x = 144,907,953,498.90/439,905
6. Step 6: Final answer
   x = 329,407.38