Finding the Fourth Proportional to 22,478.17, 31,019.84 and 12,406.63

Step by Step Solution

1. Step 1: Write the proportion equation
   22,478.17 : 31,019.84 = 12,406.63 : x
2. Step 2: Convert to fraction form
   22,478.17/31,019.84 = 12,406.63/x
3. Step 3: Cross multiply
   22,478.17x = 31,019.84 × 12,406.63
4. Step 4: Simplify right side
   22,478.17x = 384,851,460.41
5. Step 5: Solve for x
   x = 384,851,460.41/22,478.17
6. Step 6: Final answer
   x = 17,121.12