Finding the Fourth Proportional to 209,031.32, 288,465.56 and 123,009.32

Step by Step Solution

1. Step 1: Write the proportion equation
   209,031.32 : 288,465.56 = 123,009.32 : x
2. Step 2: Convert to fraction form
   209,031.32/288,465.56 = 123,009.32/x
3. Step 3: Cross multiply
   209,031.32x = 288,465.56 × 123,009.32
4. Step 4: Simplify right side
   209,031.32x = 35,483,950,321.64
5. Step 5: Solve for x
   x = 35,483,950,321.64/209,031.32
6. Step 6: Final answer
   x = 169,754.23