Finding the Fourth Proportional to 9,145.42, 12,620.03 and 5,316.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.42 : 12,620.03 = 5,316.69 : x
2. Step 2: Convert to fraction form
   9,145.42/12,620.03 = 5,316.69/x
3. Step 3: Cross multiply
   9,145.42x = 12,620.03 × 5,316.69
4. Step 4: Simplify right side
   9,145.42x = 67,096,710.91
5. Step 5: Solve for x
   x = 67,096,710.91/9,145.42
6. Step 6: Final answer
   x = 7,336.65