Finding the Fourth Proportional to 245,756.32, 339,142.89 and 138,326.29

Step by Step Solution

1. Step 1: Write the proportion equation
   245,756.32 : 339,142.89 = 138,326.29 : x
2. Step 2: Convert to fraction form
   245,756.32/339,142.89 = 138,326.29/x
3. Step 3: Cross multiply
   245,756.32x = 339,142.89 × 138,326.29
4. Step 4: Simplify right side
   245,756.32x = 46,912,377,753.58
5. Step 5: Solve for x
   x = 46,912,377,753.58/245,756.32
6. Step 6: Final answer
   x = 190,889.81