Finding the Fourth Proportional to 352,300.22, 486,300.38 and 209,060.22

Step by Step Solution

1. Step 1: Write the proportion equation
   352,300.22 : 486,300.38 = 209,060.22 : x
2. Step 2: Convert to fraction form
   352,300.22/486,300.38 = 209,060.22/x
3. Step 3: Cross multiply
   352,300.22x = 486,300.38 × 209,060.22
4. Step 4: Simplify right side
   352,300.22x = 101,666,063,383.58
5. Step 5: Solve for x
   x = 101,666,063,383.58/352,300.22
6. Step 6: Final answer
   x = 288,577.92