Finding the Fourth Proportional to 9,978.14, 14,967.03 and 3,408.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.14 : 14,967.03 = 3,408.86 : x
2. Step 2: Convert to fraction form
   9,978.14/14,967.03 = 3,408.86/x
3. Step 3: Cross multiply
   9,978.14x = 14,967.03 × 3,408.86
4. Step 4: Simplify right side
   9,978.14x = 51,020,509.89
5. Step 5: Solve for x
   x = 51,020,509.89/9,978.14
6. Step 6: Final answer
   x = 5,113.23