Finding the Fourth Proportional to 208,820.52, 288,221.76 and 123,986.52

Step by Step Solution

1. Step 1: Write the proportion equation
   208,820.52 : 288,221.76 = 123,986.52 : x
2. Step 2: Convert to fraction form
   208,820.52/288,221.76 = 123,986.52/x
3. Step 3: Cross multiply
   208,820.52x = 288,221.76 × 123,986.52
4. Step 4: Simplify right side
   208,820.52x = 35,735,613,010.68
5. Step 5: Solve for x
   x = 35,735,613,010.68/208,820.52
6. Step 6: Final answer
   x = 171,130.75