Finding the Fourth Proportional to 22,930.47, 31,642.56 and 12,858.84

Step by Step Solution

1. Step 1: Write the proportion equation
   22,930.47 : 31,642.56 = 12,858.84 : x
2. Step 2: Convert to fraction form
   22,930.47/31,642.56 = 12,858.84/x
3. Step 3: Cross multiply
   22,930.47x = 31,642.56 × 12,858.84
4. Step 4: Simplify right side
   22,930.47x = 406,886,616.23
5. Step 5: Solve for x
   x = 406,886,616.23/22,930.47
6. Step 6: Final answer
   x = 17,744.36