Finding the Fourth Proportional to 12,296.23, 16,978.29 and 9,459.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,296.23 : 16,978.29 = 9,459.20 : x
2. Step 2: Convert to fraction form
   12,296.23/16,978.29 = 9,459.20/x
3. Step 3: Cross multiply
   12,296.23x = 16,978.29 × 9,459.20
4. Step 4: Simplify right side
   12,296.23x = 160,601,040.77
5. Step 5: Solve for x
   x = 160,601,040.77/12,296.23
6. Step 6: Final answer
   x = 13,061.00