Finding the Fourth Proportional to 11,420.59, 15,760.73 and 6,385.37

Step by Step Solution

1. Step 1: Write the proportion equation
   11,420.59 : 15,760.73 = 6,385.37 : x
2. Step 2: Convert to fraction form
   11,420.59/15,760.73 = 6,385.37/x
3. Step 3: Cross multiply
   11,420.59x = 15,760.73 × 6,385.37
4. Step 4: Simplify right side
   11,420.59x = 100,638,147.89
5. Step 5: Solve for x
   x = 100,638,147.89/11,420.59
6. Step 6: Final answer
   x = 8,811.99