Finding the Fourth Proportional to 22,769.05, 31,419.93 and 12,698.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,769.05 : 31,419.93 = 12,698.16 : x
2. Step 2: Convert to fraction form
   22,769.05/31,419.93 = 12,698.16/x
3. Step 3: Cross multiply
   22,769.05x = 31,419.93 × 12,698.16
4. Step 4: Simplify right side
   22,769.05x = 398,975,298.33
5. Step 5: Solve for x
   x = 398,975,298.33/22,769.05
6. Step 6: Final answer
   x = 17,522.70