Finding the Fourth Proportional to 392,460.72, 541,580.76 and 222,684.72

Step by Step Solution

1. Step 1: Write the proportion equation
   392,460.72 : 541,580.76 = 222,684.72 : x
2. Step 2: Convert to fraction form
   392,460.72/541,580.76 = 222,684.72/x
3. Step 3: Cross multiply
   392,460.72x = 541,580.76 × 222,684.72
4. Step 4: Simplify right side
   392,460.72x = 120,601,759,897.99
5. Step 5: Solve for x
   x = 120,601,759,897.99/392,460.72
6. Step 6: Final answer
   x = 307,296.38