Finding the Fourth Proportional to 12,327.63, 16,991.42 and 9,342.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,327.63 : 16,991.42 = 9,342.51 : x
2. Step 2: Convert to fraction form
   12,327.63/16,991.42 = 9,342.51/x
3. Step 3: Cross multiply
   12,327.63x = 16,991.42 × 9,342.51
4. Step 4: Simplify right side
   12,327.63x = 158,742,464.55
5. Step 5: Solve for x
   x = 158,742,464.55/12,327.63
6. Step 6: Final answer
   x = 12,876.97