Finding the Fourth Proportional to 138,243.83, 190,807.59 and 90,469.49

Step by Step Solution

1. Step 1: Write the proportion equation
   138,243.83 : 190,807.59 = 90,469.49 : x
2. Step 2: Convert to fraction form
   138,243.83/190,807.59 = 90,469.49/x
3. Step 3: Cross multiply
   138,243.83x = 190,807.59 × 90,469.49
4. Step 4: Simplify right side
   138,243.83x = 17,262,265,355.43
5. Step 5: Solve for x
   x = 17,262,265,355.43/138,243.83
6. Step 6: Final answer
   x = 124,868.25