Finding the Fourth Proportional to 10,387.82, 14,335.72 and 5,912.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,387.82 : 14,335.72 = 5,912.21 : x
2. Step 2: Convert to fraction form
   10,387.82/14,335.72 = 5,912.21/x
3. Step 3: Cross multiply
   10,387.82x = 14,335.72 × 5,912.21
4. Step 4: Simplify right side
   10,387.82x = 84,755,787.14
5. Step 5: Solve for x
   x = 84,755,787.14/10,387.82
6. Step 6: Final answer
   x = 8,159.15