Finding the Fourth Proportional to 9,559.64, 14,342.02 and 8,645.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,559.64 : 14,342.02 = 8,645.72 : x
2. Step 2: Convert to fraction form
   9,559.64/14,342.02 = 8,645.72/x
3. Step 3: Cross multiply
   9,559.64x = 14,342.02 × 8,645.72
4. Step 4: Simplify right side
   9,559.64x = 123,997,089.15
5. Step 5: Solve for x
   x = 123,997,089.15/9,559.64
6. Step 6: Final answer
   x = 12,970.90