Finding the Fourth Proportional to 384,826.48, 531,084.12 and 215,074.16

Step by Step Solution

1. Step 1: Write the proportion equation
   384,826.48 : 531,084.12 = 215,074.16 : x
2. Step 2: Convert to fraction form
   384,826.48/531,084.12 = 215,074.16/x
3. Step 3: Cross multiply
   384,826.48x = 531,084.12 × 215,074.16
4. Step 4: Simplify right side
   384,826.48x = 114,222,470,998.34
5. Step 5: Solve for x
   x = 114,222,470,998.34/384,826.48
6. Step 6: Final answer
   x = 296,815.52