Finding the Fourth Proportional to 19,643.51, 27,076.57 and 13,268.10

Step by Step Solution

1. Step 1: Write the proportion equation
   19,643.51 : 27,076.57 = 13,268.10 : x
2. Step 2: Convert to fraction form
   19,643.51/27,076.57 = 13,268.10/x
3. Step 3: Cross multiply
   19,643.51x = 27,076.57 × 13,268.10
4. Step 4: Simplify right side
   19,643.51x = 359,254,638.42
5. Step 5: Solve for x
   x = 359,254,638.42/19,643.51
6. Step 6: Final answer
   x = 18,288.72