Finding the Fourth Proportional to 22,476.48, 31,017.87 and 12,405.39

Step by Step Solution

1. Step 1: Write the proportion equation
   22,476.48 : 31,017.87 = 12,405.39 : x
2. Step 2: Convert to fraction form
   22,476.48/31,017.87 = 12,405.39/x
3. Step 3: Cross multiply
   22,476.48x = 31,017.87 × 12,405.39
4. Step 4: Simplify right side
   22,476.48x = 384,788,774.32
5. Step 5: Solve for x
   x = 384,788,774.32/22,476.48
6. Step 6: Final answer
   x = 17,119.62