Finding the Third Proportional to 978.50 and 1,431

Step by Step Solution

1. Step 1: Write the proportion equation
   978.50 : 1,431 = 1,431 : x
2. Step 2: Convert to fraction form
   978.50/1,431 = 1,431/x
3. Step 3: Cross multiply
   978.50x = 1,431 × 1,431
4. Step 4: Simplify right side
   978.50x = 2,047,761
5. Step 5: Solve for x
   x = 2,047,761/978.50
6. Step 6: Final answer
   x = 2,092.76