Finding the Fourth Proportional to 9,621.10, 14,409.78 and 7,528.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,621.10 : 14,409.78 = 7,528.06 : x
2. Step 2: Convert to fraction form
   9,621.10/14,409.78 = 7,528.06/x
3. Step 3: Cross multiply
   9,621.10x = 14,409.78 × 7,528.06
4. Step 4: Simplify right side
   9,621.10x = 108,477,688.43
5. Step 5: Solve for x
   x = 108,477,688.43/9,621.10
6. Step 6: Final answer
   x = 11,274.98