Finding the Fourth Proportional to 245,443.62, 338,699.80 and 138,007.25

Step by Step Solution

1. Step 1: Write the proportion equation
   245,443.62 : 338,699.80 = 138,007.25 : x
2. Step 2: Convert to fraction form
   245,443.62/338,699.80 = 138,007.25/x
3. Step 3: Cross multiply
   245,443.62x = 338,699.80 × 138,007.25
4. Step 4: Simplify right side
   245,443.62x = 46,743,027,973.55
5. Step 5: Solve for x
   x = 46,743,027,973.55/245,443.62
6. Step 6: Final answer
   x = 190,443.04