Finding the Fourth Proportional to 298,513.98, 411,978.39 and 222,931.26

Step by Step Solution

1. Step 1: Write the proportion equation
   298,513.98 : 411,978.39 = 222,931.26 : x
2. Step 2: Convert to fraction form
   298,513.98/411,978.39 = 222,931.26/x
3. Step 3: Cross multiply
   298,513.98x = 411,978.39 × 222,931.26
4. Step 4: Simplify right side
   298,513.98x = 91,842,861,575.47
5. Step 5: Solve for x
   x = 91,842,861,575.47/298,513.98
6. Step 6: Final answer
   x = 307,666.87