Finding the Fourth Proportional to 209,111.76, 288,575.42 and 123,073.97

Step by Step Solution

1. Step 1: Write the proportion equation
   209,111.76 : 288,575.42 = 123,073.97 : x
2. Step 2: Convert to fraction form
   209,111.76/288,575.42 = 123,073.97/x
3. Step 3: Cross multiply
   209,111.76x = 288,575.42 × 123,073.97
4. Step 4: Simplify right side
   209,111.76x = 35,516,120,525.57
5. Step 5: Solve for x
   x = 35,516,120,525.57/209,111.76
6. Step 6: Final answer
   x = 169,842.77