Finding the Fourth Proportional to 19,776.03, 29,618.69 and 12,829.47

Step by Step Solution

1. Step 1: Write the proportion equation
   19,776.03 : 29,618.69 = 12,829.47 : x
2. Step 2: Convert to fraction form
   19,776.03/29,618.69 = 12,829.47/x
3. Step 3: Cross multiply
   19,776.03x = 29,618.69 × 12,829.47
4. Step 4: Simplify right side
   19,776.03x = 379,992,030.65
5. Step 5: Solve for x
   x = 379,992,030.65/19,776.03
6. Step 6: Final answer
   x = 19,214.78