Finding the Third Proportional to 621,043.50 and 878,955

Step by Step Solution

1. Step 1: Write the proportion equation
   621,043.50 : 878,955 = 878,955 : x
2. Step 2: Convert to fraction form
   621,043.50/878,955 = 878,955/x
3. Step 3: Cross multiply
   621,043.50x = 878,955 × 878,955
4. Step 4: Simplify right side
   621,043.50x = 772,561,892,025
5. Step 5: Solve for x
   x = 772,561,892,025/621,043.50
6. Step 6: Final answer
   x = 1,243,973.88