Finding the Fourth Proportional to 314,788.62, 472,009.79 and 215,061.42

Step by Step Solution

1. Step 1: Write the proportion equation
   314,788.62 : 472,009.79 = 215,061.42 : x
2. Step 2: Convert to fraction form
   314,788.62/472,009.79 = 215,061.42/x
3. Step 3: Cross multiply
   314,788.62x = 472,009.79 × 215,061.42
4. Step 4: Simplify right side
   314,788.62x = 101,511,096,228.96
5. Step 5: Solve for x
   x = 101,511,096,228.96/314,788.62
6. Step 6: Final answer
   x = 322,473.84