Finding the Fourth Proportional to 9,404.84, 12,980.04 and 5,425.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.84 : 12,980.04 = 5,425.16 : x
2. Step 2: Convert to fraction form
   9,404.84/12,980.04 = 5,425.16/x
3. Step 3: Cross multiply
   9,404.84x = 12,980.04 × 5,425.16
4. Step 4: Simplify right side
   9,404.84x = 70,418,793.81
5. Step 5: Solve for x
   x = 70,418,793.81/9,404.84
6. Step 6: Final answer
   x = 7,487.51