Finding the Fourth Proportional to 13,642.71, 18,821.61 and 7,673.01

Step by Step Solution

1. Step 1: Write the proportion equation
   13,642.71 : 18,821.61 = 7,673.01 : x
2. Step 2: Convert to fraction form
   13,642.71/18,821.61 = 7,673.01/x
3. Step 3: Cross multiply
   13,642.71x = 18,821.61 × 7,673.01
4. Step 4: Simplify right side
   13,642.71x = 144,418,401.75
5. Step 5: Solve for x
   x = 144,418,401.75/13,642.71
6. Step 6: Final answer
   x = 10,585.76