Finding the Fourth Proportional to 10,775.60, 14,877.24 and 9,712.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,775.60 : 14,877.24 = 9,712.88 : x
2. Step 2: Convert to fraction form
   10,775.60/14,877.24 = 9,712.88/x
3. Step 3: Cross multiply
   10,775.60x = 14,877.24 × 9,712.88
4. Step 4: Simplify right side
   10,775.60x = 144,500,846.85
5. Step 5: Solve for x
   x = 144,500,846.85/10,775.60
6. Step 6: Final answer
   x = 13,410.00