Finding the Fourth Proportional to 12,636.63, 18,951.69 and 3,749.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,636.63 : 18,951.69 = 3,749.87 : x
2. Step 2: Convert to fraction form
   12,636.63/18,951.69 = 3,749.87/x
3. Step 3: Cross multiply
   12,636.63x = 18,951.69 × 3,749.87
4. Step 4: Simplify right side
   12,636.63x = 71,066,279.02
5. Step 5: Solve for x
   x = 71,066,279.02/12,636.63
6. Step 6: Final answer
   x = 5,623.83