Finding the Fourth Proportional to 19,710.72, 27,191.34 and 13,339.53

Step by Step Solution

1. Step 1: Write the proportion equation
   19,710.72 : 27,191.34 = 13,339.53 : x
2. Step 2: Convert to fraction form
   19,710.72/27,191.34 = 13,339.53/x
3. Step 3: Cross multiply
   19,710.72x = 27,191.34 × 13,339.53
4. Step 4: Simplify right side
   19,710.72x = 362,719,695.67
5. Step 5: Solve for x
   x = 362,719,695.67/19,710.72
6. Step 6: Final answer
   x = 18,402.15