Finding the Fourth Proportional to 9,213.60, 12,715.22 and 5,181.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,213.60 : 12,715.22 = 5,181.69 : x
2. Step 2: Convert to fraction form
   9,213.60/12,715.22 = 5,181.69/x
3. Step 3: Cross multiply
   9,213.60x = 12,715.22 × 5,181.69
4. Step 4: Simplify right side
   9,213.60x = 65,886,359.81
5. Step 5: Solve for x
   x = 65,886,359.81/9,213.60
6. Step 6: Final answer
   x = 7,150.99