Finding the Fourth Proportional to 9,860.02, 14,704.51 and 8,408.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,860.02 : 14,704.51 = 8,408.50 : x
2. Step 2: Convert to fraction form
   9,860.02/14,704.51 = 8,408.50/x
3. Step 3: Cross multiply
   9,860.02x = 14,704.51 × 8,408.50
4. Step 4: Simplify right side
   9,860.02x = 123,642,830.29
5. Step 5: Solve for x
   x = 123,642,830.29/9,860.02
6. Step 6: Final answer
   x = 12,539.82