Finding the Fourth Proportional to 10,686.81, 14,747.71 and 5,907.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,686.81 : 14,747.71 = 5,907.07 : x
2. Step 2: Convert to fraction form
   10,686.81/14,747.71 = 5,907.07/x
3. Step 3: Cross multiply
   10,686.81x = 14,747.71 × 5,907.07
4. Step 4: Simplify right side
   10,686.81x = 87,115,755.31
5. Step 5: Solve for x
   x = 87,115,755.31/10,686.81
6. Step 6: Final answer
   x = 8,151.71