Finding the Fourth Proportional to 206,881.31, 310,321.49 and 55,078.43

Step by Step Solution

1. Step 1: Write the proportion equation
   206,881.31 : 310,321.49 = 55,078.43 : x
2. Step 2: Convert to fraction form
   206,881.31/310,321.49 = 55,078.43/x
3. Step 3: Cross multiply
   206,881.31x = 310,321.49 × 55,078.43
4. Step 4: Simplify right side
   206,881.31x = 17,092,019,050.55
5. Step 5: Solve for x
   x = 17,092,019,050.55/206,881.31
6. Step 6: Final answer
   x = 82,617.51