Finding the Third Proportional to 1,278.60 and 1,981.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278.60 : 1,981.02 = 1,981.02 : x
2. Step 2: Convert to fraction form
   1,278.60/1,981.02 = 1,981.02/x
3. Step 3: Cross multiply
   1,278.60x = 1,981.02 × 1,981.02
4. Step 4: Simplify right side
   1,278.60x = 3,924,438.38
5. Step 5: Solve for x
   x = 3,924,438.38/1,278.60
6. Step 6: Final answer
   x = 3,069.33