Finding the Fourth Proportional to 11,435.00, 15,780.45 and 6,399.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,435.00 : 15,780.45 = 6,399.42 : x
2. Step 2: Convert to fraction form
   11,435.00/15,780.45 = 6,399.42/x
3. Step 3: Cross multiply
   11,435.00x = 15,780.45 × 6,399.42
4. Step 4: Simplify right side
   11,435.00x = 100,985,727.34
5. Step 5: Solve for x
   x = 100,985,727.34/11,435.00
6. Step 6: Final answer
   x = 8,831.29