Finding the Fourth Proportional to 19,900.35, 27,457.52 and 12,818.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,900.35 : 27,457.52 = 12,818.25 : x
2. Step 2: Convert to fraction form
   19,900.35/27,457.52 = 12,818.25/x
3. Step 3: Cross multiply
   19,900.35x = 27,457.52 × 12,818.25
4. Step 4: Simplify right side
   19,900.35x = 351,957,291.65
5. Step 5: Solve for x
   x = 351,957,291.65/19,900.35
6. Step 6: Final answer
   x = 17,685.99