Finding the Fourth Proportional to 16,051.63, 22,152.28 and 8,978.11

Step by Step Solution

1. Step 1: Write the proportion equation
   16,051.63 : 22,152.28 = 8,978.11 : x
2. Step 2: Convert to fraction form
   16,051.63/22,152.28 = 8,978.11/x
3. Step 3: Cross multiply
   16,051.63x = 22,152.28 × 8,978.11
4. Step 4: Simplify right side
   16,051.63x = 198,885,606.59
5. Step 5: Solve for x
   x = 198,885,606.59/16,051.63
6. Step 6: Final answer
   x = 12,390.37