Finding the Third Proportional to 1,316.56 and 1,978.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,316.56 : 1,978.22 = 1,978.22 : x
2. Step 2: Convert to fraction form
   1,316.56/1,978.22 = 1,978.22/x
3. Step 3: Cross multiply
   1,316.56x = 1,978.22 × 1,978.22
4. Step 4: Simplify right side
   1,316.56x = 3,913,349.42
5. Step 5: Solve for x
   x = 3,913,349.42/1,316.56
6. Step 6: Final answer
   x = 2,972.40