Finding the Fourth Proportional to 13,073.47, 18,039.31 and 7,696.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,073.47 : 18,039.31 = 7,696.18 : x
2. Step 2: Convert to fraction form
   13,073.47/18,039.31 = 7,696.18/x
3. Step 3: Cross multiply
   13,073.47x = 18,039.31 × 7,696.18
4. Step 4: Simplify right side
   13,073.47x = 138,833,780.14
5. Step 5: Solve for x
   x = 138,833,780.14/13,073.47
6. Step 6: Final answer
   x = 10,619.51