Finding the Fourth Proportional to 9,394.32, 12,963.42 and 5,412.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,394.32 : 12,963.42 = 5,412.78 : x
2. Step 2: Convert to fraction form
   9,394.32/12,963.42 = 5,412.78/x
3. Step 3: Cross multiply
   9,394.32x = 12,963.42 × 5,412.78
4. Step 4: Simplify right side
   9,394.32x = 70,168,140.51
5. Step 5: Solve for x
   x = 70,168,140.51/9,394.32
6. Step 6: Final answer
   x = 7,469.21