Finding the Fourth Proportional to 21,462.06, 32,189.16 and 8,978.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,462.06 : 32,189.16 = 8,978.76 : x
2. Step 2: Convert to fraction form
   21,462.06/32,189.16 = 8,978.76/x
3. Step 3: Cross multiply
   21,462.06x = 32,189.16 × 8,978.76
4. Step 4: Simplify right side
   21,462.06x = 289,018,742.24
5. Step 5: Solve for x
   x = 289,018,742.24/21,462.06
6. Step 6: Final answer
   x = 13,466.50