Finding the Fourth Proportional to 123,031.22, 168,675.75 and 120,789.20

Step by Step Solution

1. Step 1: Write the proportion equation
   123,031.22 : 168,675.75 = 120,789.20 : x
2. Step 2: Convert to fraction form
   123,031.22/168,675.75 = 120,789.20/x
3. Step 3: Cross multiply
   123,031.22x = 168,675.75 × 120,789.20
4. Step 4: Simplify right side
   123,031.22x = 20,374,209,323.59
5. Step 5: Solve for x
   x = 20,374,209,323.59/123,031.22
6. Step 6: Final answer
   x = 165,601.95