Finding the Third Proportional to 621,594 and 1,287,414

Step by Step Solution

1. Step 1: Write the proportion equation
   621,594 : 1,287,414 = 1,287,414 : x
2. Step 2: Convert to fraction form
   621,594/1,287,414 = 1,287,414/x
3. Step 3: Cross multiply
   621,594x = 1,287,414 × 1,287,414
4. Step 4: Simplify right side
   621,594x = 1,657,434,807,396
5. Step 5: Solve for x
   x = 1,657,434,807,396/621,594
6. Step 6: Final answer
   x = 2,666,426.65