Finding the Fourth Proportional to 91,992.82, 138,042.78 and 38,680.94

Step by Step Solution

1. Step 1: Write the proportion equation
   91,992.82 : 138,042.78 = 38,680.94 : x
2. Step 2: Convert to fraction form
   91,992.82/138,042.78 = 38,680.94/x
3. Step 3: Cross multiply
   91,992.82x = 138,042.78 × 38,680.94
4. Step 4: Simplify right side
   91,992.82x = 5,339,624,297.21
5. Step 5: Solve for x
   x = 5,339,624,297.21/91,992.82
6. Step 6: Final answer
   x = 58,043.92