Finding the Fourth Proportional to 10,185.31, 14,055.48 and 5,709.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,185.31 : 14,055.48 = 5,709.05 : x
2. Step 2: Convert to fraction form
   10,185.31/14,055.48 = 5,709.05/x
3. Step 3: Cross multiply
   10,185.31x = 14,055.48 × 5,709.05
4. Step 4: Simplify right side
   10,185.31x = 80,243,438.09
5. Step 5: Solve for x
   x = 80,243,438.09/10,185.31
6. Step 6: Final answer
   x = 7,878.35