Finding the Fourth Proportional to 22,478.38, 31,019.85 and 12,407.01

Step by Step Solution

1. Step 1: Write the proportion equation
   22,478.38 : 31,019.85 = 12,407.01 : x
2. Step 2: Convert to fraction form
   22,478.38/31,019.85 = 12,407.01/x
3. Step 3: Cross multiply
   22,478.38x = 31,019.85 × 12,407.01
4. Step 4: Simplify right side
   22,478.38x = 384,863,697.72
5. Step 5: Solve for x
   x = 384,863,697.72/22,478.38
6. Step 6: Final answer
   x = 17,121.50