Finding the Fourth Proportional to 23,019.05, 31,769.10 and 12,947.91

Step by Step Solution

1. Step 1: Write the proportion equation
   23,019.05 : 31,769.10 = 12,947.91 : x
2. Step 2: Convert to fraction form
   23,019.05/31,769.10 = 12,947.91/x
3. Step 3: Cross multiply
   23,019.05x = 31,769.10 × 12,947.91
4. Step 4: Simplify right side
   23,019.05x = 411,343,447.58
5. Step 5: Solve for x
   x = 411,343,447.58/23,019.05
6. Step 6: Final answer
   x = 17,869.70