Finding the Fourth Proportional to 245,723.30, 339,109.07 and 138,300.30

Step by Step Solution

1. Step 1: Write the proportion equation
   245,723.30 : 339,109.07 = 138,300.30 : x
2. Step 2: Convert to fraction form
   245,723.30/339,109.07 = 138,300.30/x
3. Step 3: Cross multiply
   245,723.30x = 339,109.07 × 138,300.30
4. Step 4: Simplify right side
   245,723.30x = 46,898,886,113.72
5. Step 5: Solve for x
   x = 46,898,886,113.72/245,723.30
6. Step 6: Final answer
   x = 190,860.56