Finding the Fourth Proportional to 9,406.32, 12,978.79 and 5,372.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,406.32 : 12,978.79 = 5,372.92 : x
2. Step 2: Convert to fraction form
   9,406.32/12,978.79 = 5,372.92/x
3. Step 3: Cross multiply
   9,406.32x = 12,978.79 × 5,372.92
4. Step 4: Simplify right side
   9,406.32x = 69,734,000.37
5. Step 5: Solve for x
   x = 69,734,000.37/9,406.32
6. Step 6: Final answer
   x = 7,413.53