Finding the Fourth Proportional to 9,856, 13,603.59 and 6,499.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,856 : 13,603.59 = 6,499.42 : x
2. Step 2: Convert to fraction form
   9,856/13,603.59 = 6,499.42/x
3. Step 3: Cross multiply
   9,856x = 13,603.59 × 6,499.42
4. Step 4: Simplify right side
   9,856x = 88,415,444.92
5. Step 5: Solve for x
   x = 88,415,444.92/9,856
6. Step 6: Final answer
   x = 8,970.72