Finding the Fourth Proportional to 208,788.27, 288,111.98 and 122,750.78

Step by Step Solution

1. Step 1: Write the proportion equation
   208,788.27 : 288,111.98 = 122,750.78 : x
2. Step 2: Convert to fraction form
   208,788.27/288,111.98 = 122,750.78/x
3. Step 3: Cross multiply
   208,788.27x = 288,111.98 × 122,750.78
4. Step 4: Simplify right side
   208,788.27x = 35,365,970,272.34
5. Step 5: Solve for x
   x = 35,365,970,272.34/208,788.27
6. Step 6: Final answer
   x = 169,386.77