Finding the Third Proportional to 870.50 and 1,236

Step by Step Solution

1. Step 1: Write the proportion equation
   870.50 : 1,236 = 1,236 : x
2. Step 2: Convert to fraction form
   870.50/1,236 = 1,236/x
3. Step 3: Cross multiply
   870.50x = 1,236 × 1,236
4. Step 4: Simplify right side
   870.50x = 1,527,696
5. Step 5: Solve for x
   x = 1,527,696/870.50
6. Step 6: Final answer
   x = 1,754.96