Finding the Fourth Proportional to 10,807.61, 14,871.53 and 10,739.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,807.61 : 14,871.53 = 10,739.57 : x
2. Step 2: Convert to fraction form
   10,807.61/14,871.53 = 10,739.57/x
3. Step 3: Cross multiply
   10,807.61x = 14,871.53 × 10,739.57
4. Step 4: Simplify right side
   10,807.61x = 159,713,789.93
5. Step 5: Solve for x
   x = 159,713,789.93/10,807.61
6. Step 6: Final answer
   x = 14,777.91