Finding the Fourth Proportional to 9,521.62, 14,272.62 and 3,978.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,521.62 : 14,272.62 = 3,978.20 : x
2. Step 2: Convert to fraction form
   9,521.62/14,272.62 = 3,978.20/x
3. Step 3: Cross multiply
   9,521.62x = 14,272.62 × 3,978.20
4. Step 4: Simplify right side
   9,521.62x = 56,779,336.88
5. Step 5: Solve for x
   x = 56,779,336.88/9,521.62
6. Step 6: Final answer
   x = 5,963.20