Finding the Fourth Proportional to 9,388.98, 12,956.80 and 5,412.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,388.98 : 12,956.80 = 5,412.42 : x
2. Step 2: Convert to fraction form
   9,388.98/12,956.80 = 5,412.42/x
3. Step 3: Cross multiply
   9,388.98x = 12,956.80 × 5,412.42
4. Step 4: Simplify right side
   9,388.98x = 70,127,643.46
5. Step 5: Solve for x
   x = 70,127,643.46/9,388.98
6. Step 6: Final answer
   x = 7,469.14