Finding the Fourth Proportional to 19,667.76, 29,486.22 and 13,412.22

Step by Step Solution

1. Step 1: Write the proportion equation
   19,667.76 : 29,486.22 = 13,412.22 : x
2. Step 2: Convert to fraction form
   19,667.76/29,486.22 = 13,412.22/x
3. Step 3: Cross multiply
   19,667.76x = 29,486.22 × 13,412.22
4. Step 4: Simplify right side
   19,667.76x = 395,475,669.61
5. Step 5: Solve for x
   x = 395,475,669.61/19,667.76
6. Step 6: Final answer
   x = 20,107.81