Finding the Fourth Proportional to 382,831, 528,297.78 and 213,061.48

Step by Step Solution

1. Step 1: Write the proportion equation
   382,831 : 528,297.78 = 213,061.48 : x
2. Step 2: Convert to fraction form
   382,831/528,297.78 = 213,061.48/x
3. Step 3: Cross multiply
   382,831x = 528,297.78 × 213,061.48
4. Step 4: Simplify right side
   382,831x = 112,559,906,887.51
5. Step 5: Solve for x
   x = 112,559,906,887.51/382,831
6. Step 6: Final answer
   x = 294,019.83