Finding the Fourth Proportional to 12,401.81, 18,602.86 and 3,636.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,401.81 : 18,602.86 = 3,636.90 : x
2. Step 2: Convert to fraction form
   12,401.81/18,602.86 = 3,636.90/x
3. Step 3: Cross multiply
   12,401.81x = 18,602.86 × 3,636.90
4. Step 4: Simplify right side
   12,401.81x = 67,656,630.34
5. Step 5: Solve for x
   x = 67,656,630.34/12,401.81
6. Step 6: Final answer
   x = 5,455.39