Finding the Fourth Proportional to 12,890.02, 19,180.62 and 12,846.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,890.02 : 19,180.62 = 12,846.28 : x
2. Step 2: Convert to fraction form
   12,890.02/19,180.62 = 12,846.28/x
3. Step 3: Cross multiply
   12,890.02x = 19,180.62 × 12,846.28
4. Step 4: Simplify right side
   12,890.02x = 246,399,615.09
5. Step 5: Solve for x
   x = 246,399,615.09/12,890.02
6. Step 6: Final answer
   x = 19,115.53