Finding the Fourth Proportional to 245,654.56, 339,002.67 and 138,224.71

Step by Step Solution

1. Step 1: Write the proportion equation
   245,654.56 : 339,002.67 = 138,224.71 : x
2. Step 2: Convert to fraction form
   245,654.56/339,002.67 = 138,224.71/x
3. Step 3: Cross multiply
   245,654.56x = 339,002.67 × 138,224.71
4. Step 4: Simplify right side
   245,654.56x = 46,858,545,749.98
5. Step 5: Solve for x
   x = 46,858,545,749.98/245,654.56
6. Step 6: Final answer
   x = 190,749.75