Finding the Fourth Proportional to 1,186.55, 1,636.71 and 738.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,186.55 : 1,636.71 = 738.67 : x
2. Step 2: Convert to fraction form
   1,186.55/1,636.71 = 738.67/x
3. Step 3: Cross multiply
   1,186.55x = 1,636.71 × 738.67
4. Step 4: Simplify right side
   1,186.55x = 1,208,988.58
5. Step 5: Solve for x
   x = 1,208,988.58/1,186.55
6. Step 6: Final answer
   x = 1,018.91