Finding the Fourth Proportional to 9,388.02, 12,951.10 and 5,406.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,388.02 : 12,951.10 = 5,406.83 : x
2. Step 2: Convert to fraction form
   9,388.02/12,951.10 = 5,406.83/x
3. Step 3: Cross multiply
   9,388.02x = 12,951.10 × 5,406.83
4. Step 4: Simplify right side
   9,388.02x = 70,024,304.22
5. Step 5: Solve for x
   x = 70,024,304.22/9,388.02
6. Step 6: Final answer
   x = 7,458.90