Finding the Fourth Proportional to 12,423.31, 18,636.18 and 4,630.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,423.31 : 18,636.18 = 4,630.30 : x
2. Step 2: Convert to fraction form
   12,423.31/18,636.18 = 4,630.30/x
3. Step 3: Cross multiply
   12,423.31x = 18,636.18 × 4,630.30
4. Step 4: Simplify right side
   12,423.31x = 86,291,104.25
5. Step 5: Solve for x
   x = 86,291,104.25/12,423.31
6. Step 6: Final answer
   x = 6,945.90