Finding the Fourth Proportional to 23,050.81, 31,807.68 and 12,979.08

Step by Step Solution

1. Step 1: Write the proportion equation
   23,050.81 : 31,807.68 = 12,979.08 : x
2. Step 2: Convert to fraction form
   23,050.81/31,807.68 = 12,979.08/x
3. Step 3: Cross multiply
   23,050.81x = 31,807.68 × 12,979.08
4. Step 4: Simplify right side
   23,050.81x = 412,834,423.33
5. Step 5: Solve for x
   x = 412,834,423.33/23,050.81
6. Step 6: Final answer
   x = 17,909.76