Finding the Fourth Proportional to 10,607.76, 14,647.32 and 9,486.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,607.76 : 14,647.32 = 9,486.72 : x
2. Step 2: Convert to fraction form
   10,607.76/14,647.32 = 9,486.72/x
3. Step 3: Cross multiply
   10,607.76x = 14,647.32 × 9,486.72
4. Step 4: Simplify right side
   10,607.76x = 138,955,023.59
5. Step 5: Solve for x
   x = 138,955,023.59/10,607.76
6. Step 6: Final answer
   x = 13,099.37