Finding the Fourth Proportional to 9,412.34, 12,988.55 and 5,433.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,412.34 : 12,988.55 = 5,433.21 : x
2. Step 2: Convert to fraction form
   9,412.34/12,988.55 = 5,433.21/x
3. Step 3: Cross multiply
   9,412.34x = 12,988.55 × 5,433.21
4. Step 4: Simplify right side
   9,412.34x = 70,569,533.33
5. Step 5: Solve for x
   x = 70,569,533.33/9,412.34
6. Step 6: Final answer
   x = 7,497.56