Finding the Fourth Proportional to 9,618.50, 14,427.59 and 7,971.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,618.50 : 14,427.59 = 7,971.56 : x
2. Step 2: Convert to fraction form
   9,618.50/14,427.59 = 7,971.56/x
3. Step 3: Cross multiply
   9,618.50x = 14,427.59 × 7,971.56
4. Step 4: Simplify right side
   9,618.50x = 115,010,489.86
5. Step 5: Solve for x
   x = 115,010,489.86/9,618.50
6. Step 6: Final answer
   x = 11,957.22