Finding the Fourth Proportional to 13,066.71, 19,696.50 and 12,304.65

Step by Step Solution

1. Step 1: Write the proportion equation
   13,066.71 : 19,696.50 = 12,304.65 : x
2. Step 2: Convert to fraction form
   13,066.71/19,696.50 = 12,304.65/x
3. Step 3: Cross multiply
   13,066.71x = 19,696.50 × 12,304.65
4. Step 4: Simplify right side
   13,066.71x = 242,358,538.73
5. Step 5: Solve for x
   x = 242,358,538.73/13,066.71
6. Step 6: Final answer
   x = 18,547.79