Finding the Fourth Proportional to 245,308.79, 338,535.71 and 137,878.49

Step by Step Solution

1. Step 1: Write the proportion equation
   245,308.79 : 338,535.71 = 137,878.49 : x
2. Step 2: Convert to fraction form
   245,308.79/338,535.71 = 137,878.49/x
3. Step 3: Cross multiply
   245,308.79x = 338,535.71 × 137,878.49
4. Step 4: Simplify right side
   245,308.79x = 46,676,790,123.81
5. Step 5: Solve for x
   x = 46,676,790,123.81/245,308.79
6. Step 6: Final answer
   x = 190,277.69