Finding the Fourth Proportional to 245,498.69, 338,784.92 and 138,068.71

Step by Step Solution

1. Step 1: Write the proportion equation
   245,498.69 : 338,784.92 = 138,068.71 : x
2. Step 2: Convert to fraction form
   245,498.69/338,784.92 = 138,068.71/x
3. Step 3: Cross multiply
   245,498.69x = 338,784.92 × 138,068.71
4. Step 4: Simplify right side
   245,498.69x = 46,775,598,913.94
5. Step 5: Solve for x
   x = 46,775,598,913.94/245,498.69
6. Step 6: Final answer
   x = 190,532.99