Finding the Fourth Proportional to 397,112.94, 548,019.32 and 215,824.83

Step by Step Solution

1. Step 1: Write the proportion equation
   397,112.94 : 548,019.32 = 215,824.83 : x
2. Step 2: Convert to fraction form
   397,112.94/548,019.32 = 215,824.83/x
3. Step 3: Cross multiply
   397,112.94x = 548,019.32 × 215,824.83
4. Step 4: Simplify right side
   397,112.94x = 118,276,175,496.59
5. Step 5: Solve for x
   x = 118,276,175,496.59/397,112.94
6. Step 6: Final answer
   x = 297,840.14