Finding the Fourth Proportional to 10,945.86, 16,420.93 and 3,923.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,945.86 : 16,420.93 = 3,923.99 : x
2. Step 2: Convert to fraction form
   10,945.86/16,420.93 = 3,923.99/x
3. Step 3: Cross multiply
   10,945.86x = 16,420.93 × 3,923.99
4. Step 4: Simplify right side
   10,945.86x = 64,435,565.11
5. Step 5: Solve for x
   x = 64,435,565.11/10,945.86
6. Step 6: Final answer
   x = 5,886.75