Finding the Fourth Proportional to 9,521.20, 14,274.05 and 3,978.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,521.20 : 14,274.05 = 3,978.67 : x
2. Step 2: Convert to fraction form
   9,521.20/14,274.05 = 3,978.67/x
3. Step 3: Cross multiply
   9,521.20x = 14,274.05 × 3,978.67
4. Step 4: Simplify right side
   9,521.20x = 56,791,716.89
5. Step 5: Solve for x
   x = 56,791,716.89/9,521.20
6. Step 6: Final answer
   x = 5,964.77