Finding the Third Proportional to 864,276 and 1,308,339

Step by Step Solution

1. Step 1: Write the proportion equation
   864,276 : 1,308,339 = 1,308,339 : x
2. Step 2: Convert to fraction form
   864,276/1,308,339 = 1,308,339/x
3. Step 3: Cross multiply
   864,276x = 1,308,339 × 1,308,339
4. Step 4: Simplify right side
   864,276x = 1,711,750,938,921
5. Step 5: Solve for x
   x = 1,711,750,938,921/864,276
6. Step 6: Final answer
   x = 1,980,560.54