Finding the Fourth Proportional to 139,825.77, 209,655.69 and 55,540.61

Step by Step Solution

1. Step 1: Write the proportion equation
   139,825.77 : 209,655.69 = 55,540.61 : x
2. Step 2: Convert to fraction form
   139,825.77/209,655.69 = 55,540.61/x
3. Step 3: Cross multiply
   139,825.77x = 209,655.69 × 55,540.61
4. Step 4: Simplify right side
   139,825.77x = 11,644,404,912.57
5. Step 5: Solve for x
   x = 11,644,404,912.57/139,825.77
6. Step 6: Final answer
   x = 83,277.96