Finding the Fourth Proportional to 12,259.16, 16,864.55 and 10,739.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,259.16 : 16,864.55 = 10,739.87 : x
2. Step 2: Convert to fraction form
   12,259.16/16,864.55 = 10,739.87/x
3. Step 3: Cross multiply
   12,259.16x = 16,864.55 × 10,739.87
4. Step 4: Simplify right side
   12,259.16x = 181,123,119.86
5. Step 5: Solve for x
   x = 181,123,119.86/12,259.16
6. Step 6: Final answer
   x = 14,774.52