Finding the Fourth Proportional to 200,081.70, 276,136.56 and 115,215.30

Step by Step Solution

1. Step 1: Write the proportion equation
   200,081.70 : 276,136.56 = 115,215.30 : x
2. Step 2: Convert to fraction form
   200,081.70/276,136.56 = 115,215.30/x
3. Step 3: Cross multiply
   200,081.70x = 276,136.56 × 115,215.30
4. Step 4: Simplify right side
   200,081.70x = 31,815,156,601.37
5. Step 5: Solve for x
   x = 31,815,156,601.37/200,081.70
6. Step 6: Final answer
   x = 159,010.83