Finding the Fourth Proportional to 206,026.86, 308,976.71 and 72,876.50

Step by Step Solution

1. Step 1: Write the proportion equation
   206,026.86 : 308,976.71 = 72,876.50 : x
2. Step 2: Convert to fraction form
   206,026.86/308,976.71 = 72,876.50/x
3. Step 3: Cross multiply
   206,026.86x = 308,976.71 × 72,876.50
4. Step 4: Simplify right side
   206,026.86x = 22,517,139,843.62
5. Step 5: Solve for x
   x = 22,517,139,843.62/206,026.86
6. Step 6: Final answer
   x = 109,292.25