Finding the Fourth Proportional to 1,185.99, 1,636.71 and 713.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.99 : 1,636.71 = 713.86 : x
2. Step 2: Convert to fraction form
   1,185.99/1,636.71 = 713.86/x
3. Step 3: Cross multiply
   1,185.99x = 1,636.71 × 713.86
4. Step 4: Simplify right side
   1,185.99x = 1,168,384.24
5. Step 5: Solve for x
   x = 1,168,384.24/1,185.99
6. Step 6: Final answer
   x = 985.15