Finding the Fourth Proportional to 13,007.94, 19,519.35 and 12,902.23

Step by Step Solution

1. Step 1: Write the proportion equation
   13,007.94 : 19,519.35 = 12,902.23 : x
2. Step 2: Convert to fraction form
   13,007.94/19,519.35 = 12,902.23/x
3. Step 3: Cross multiply
   13,007.94x = 19,519.35 × 12,902.23
4. Step 4: Simplify right side
   13,007.94x = 251,843,143.15
5. Step 5: Solve for x
   x = 251,843,143.15/13,007.94
6. Step 6: Final answer
   x = 19,360.72