Finding the Fourth Proportional to 10,076.85, 13,892.43 and 8,502.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,076.85 : 13,892.43 = 8,502.21 : x
2. Step 2: Convert to fraction form
   10,076.85/13,892.43 = 8,502.21/x
3. Step 3: Cross multiply
   10,076.85x = 13,892.43 × 8,502.21
4. Step 4: Simplify right side
   10,076.85x = 118,116,357.27
5. Step 5: Solve for x
   x = 118,116,357.27/10,076.85
6. Step 6: Final answer
   x = 11,721.56