Finding the Fourth Proportional to 13,085.36, 18,042.72 and 10,430.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,085.36 : 18,042.72 = 10,430.72 : x
2. Step 2: Convert to fraction form
   13,085.36/18,042.72 = 10,430.72/x
3. Step 3: Cross multiply
   13,085.36x = 18,042.72 × 10,430.72
4. Step 4: Simplify right side
   13,085.36x = 188,198,560.36
5. Step 5: Solve for x
   x = 188,198,560.36/13,085.36
6. Step 6: Final answer
   x = 14,382.38