Finding the Fourth Proportional to 12,699.23, 19,049.72 and 3,814.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,699.23 : 19,049.72 = 3,814.20 : x
2. Step 2: Convert to fraction form
   12,699.23/19,049.72 = 3,814.20/x
3. Step 3: Cross multiply
   12,699.23x = 19,049.72 × 3,814.20
4. Step 4: Simplify right side
   12,699.23x = 72,659,422.95
5. Step 5: Solve for x
   x = 72,659,422.95/12,699.23
6. Step 6: Final answer
   x = 5,721.56