Finding the Fourth Proportional to 16,051.56, 22,151.34 and 8,978.03

Step by Step Solution

1. Step 1: Write the proportion equation
   16,051.56 : 22,151.34 = 8,978.03 : x
2. Step 2: Convert to fraction form
   16,051.56/22,151.34 = 8,978.03/x
3. Step 3: Cross multiply
   16,051.56x = 22,151.34 × 8,978.03
4. Step 4: Simplify right side
   16,051.56x = 198,875,395.06
5. Step 5: Solve for x
   x = 198,875,395.06/16,051.56
6. Step 6: Final answer
   x = 12,389.79