Finding the Third Proportional to 1,116.42 and 1,318.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.42 : 1,318.92 = 1,318.92 : x
2. Step 2: Convert to fraction form
   1,116.42/1,318.92 = 1,318.92/x
3. Step 3: Cross multiply
   1,116.42x = 1,318.92 × 1,318.92
4. Step 4: Simplify right side
   1,116.42x = 1,739,554.91
5. Step 5: Solve for x
   x = 1,739,554.91/1,116.42
6. Step 6: Final answer
   x = 1,558.15