Finding the Fourth Proportional to 1,186.79, 1,637.82 and 662.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,186.79 : 1,637.82 = 662.72 : x
2. Step 2: Convert to fraction form
   1,186.79/1,637.82 = 662.72/x
3. Step 3: Cross multiply
   1,186.79x = 1,637.82 × 662.72
4. Step 4: Simplify right side
   1,186.79x = 1,085,407.88
5. Step 5: Solve for x
   x = 1,085,407.88/1,186.79
6. Step 6: Final answer
   x = 914.58