Finding the Third Proportional to 864,280 and 1,308,346

Step by Step Solution

1. Step 1: Write the proportion equation
   864,280 : 1,308,346 = 1,308,346 : x
2. Step 2: Convert to fraction form
   864,280/1,308,346 = 1,308,346/x
3. Step 3: Cross multiply
   864,280x = 1,308,346 × 1,308,346
4. Step 4: Simplify right side
   864,280x = 1,711,769,255,716
5. Step 5: Solve for x
   x = 1,711,769,255,716/864,280
6. Step 6: Final answer
   x = 1,980,572.56