Finding the Fourth Proportional to 284,172.96, 425,956.32 and 213,834.72

Step by Step Solution

1. Step 1: Write the proportion equation
   284,172.96 : 425,956.32 = 213,834.72 : x
2. Step 2: Convert to fraction form
   284,172.96/425,956.32 = 213,834.72/x
3. Step 3: Cross multiply
   284,172.96x = 425,956.32 × 213,834.72
4. Step 4: Simplify right side
   284,172.96x = 91,084,250,419.43
5. Step 5: Solve for x
   x = 91,084,250,419.43/284,172.96
6. Step 6: Final answer
   x = 320,523.99