Finding the Fourth Proportional to 22,476.78, 31,019.00 and 12,406.65

Step by Step Solution

1. Step 1: Write the proportion equation
   22,476.78 : 31,019.00 = 12,406.65 : x
2. Step 2: Convert to fraction form
   22,476.78/31,019.00 = 12,406.65/x
3. Step 3: Cross multiply
   22,476.78x = 31,019.00 × 12,406.65
4. Step 4: Simplify right side
   22,476.78x = 384,841,814.32
5. Step 5: Solve for x
   x = 384,841,814.32/22,476.78
6. Step 6: Final answer
   x = 17,121.75