Finding the Fourth Proportional to 203,111.82, 304,708.73 and 139,962.20

Step by Step Solution

1. Step 1: Write the proportion equation
   203,111.82 : 304,708.73 = 139,962.20 : x
2. Step 2: Convert to fraction form
   203,111.82/304,708.73 = 139,962.20/x
3. Step 3: Cross multiply
   203,111.82x = 304,708.73 × 139,962.20
4. Step 4: Simplify right side
   203,111.82x = 42,647,701,986.65
5. Step 5: Solve for x
   x = 42,647,701,986.65/203,111.82
6. Step 6: Final answer
   x = 209,971.54