Finding the Fourth Proportional to 22,479.00, 31,018.80 and 12,406.79

Step by Step Solution

1. Step 1: Write the proportion equation
   22,479.00 : 31,018.80 = 12,406.79 : x
2. Step 2: Convert to fraction form
   22,479.00/31,018.80 = 12,406.79/x
3. Step 3: Cross multiply
   22,479.00x = 31,018.80 × 12,406.79
4. Step 4: Simplify right side
   22,479.00x = 384,843,582.56
5. Step 5: Solve for x
   x = 384,843,582.56/22,479.00
6. Step 6: Final answer
   x = 17,120.14