Finding the Fourth Proportional to 10,621.51, 14,657.49 and 5,905.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,621.51 : 14,657.49 = 5,905.69 : x
2. Step 2: Convert to fraction form
   10,621.51/14,657.49 = 5,905.69/x
3. Step 3: Cross multiply
   10,621.51x = 14,657.49 × 5,905.69
4. Step 4: Simplify right side
   10,621.51x = 86,562,555.47
5. Step 5: Solve for x
   x = 86,562,555.47/10,621.51
6. Step 6: Final answer
   x = 8,149.74