Finding the Fourth Proportional to 384,908.16, 531,151.83 and 212,816.15

Step by Step Solution

1. Step 1: Write the proportion equation
   384,908.16 : 531,151.83 = 212,816.15 : x
2. Step 2: Convert to fraction form
   384,908.16/531,151.83 = 212,816.15/x
3. Step 3: Cross multiply
   384,908.16x = 531,151.83 × 212,816.15
4. Step 4: Simplify right side
   384,908.16x = 113,037,684,870.30
5. Step 5: Solve for x
   x = 113,037,684,870.30/384,908.16
6. Step 6: Final answer
   x = 293,674.43