Finding the Fourth Proportional to 13,300.63, 19,833.61 and 12,646.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,300.63 : 19,833.61 = 12,646.58 : x
2. Step 2: Convert to fraction form
   13,300.63/19,833.61 = 12,646.58/x
3. Step 3: Cross multiply
   13,300.63x = 19,833.61 × 12,646.58
4. Step 4: Simplify right side
   13,300.63x = 250,827,340.05
5. Step 5: Solve for x
   x = 250,827,340.05/13,300.63
6. Step 6: Final answer
   x = 18,858.30