Finding the Fourth Proportional to 8,548.86, 11,799.63 and 5,406.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,548.86 : 11,799.63 = 5,406.78 : x
2. Step 2: Convert to fraction form
   8,548.86/11,799.63 = 5,406.78/x
3. Step 3: Cross multiply
   8,548.86x = 11,799.63 × 5,406.78
4. Step 4: Simplify right side
   8,548.86x = 63,798,003.49
5. Step 5: Solve for x
   x = 63,798,003.49/8,548.86
6. Step 6: Final answer
   x = 7,462.75