Finding the Fourth Proportional to 163,081.71, 225,031 and 90,483.43

Step by Step Solution

1. Step 1: Write the proportion equation
   163,081.71 : 225,031 = 90,483.43 : x
2. Step 2: Convert to fraction form
   163,081.71/225,031 = 90,483.43/x
3. Step 3: Cross multiply
   163,081.71x = 225,031 × 90,483.43
4. Step 4: Simplify right side
   163,081.71x = 20,361,576,736.33
5. Step 5: Solve for x
   x = 20,361,576,736.33/163,081.71
6. Step 6: Final answer
   x = 124,855.06