Finding the Third Proportional to 621,042 and 878,953.50

Step by Step Solution

1. Step 1: Write the proportion equation
   621,042 : 878,953.50 = 878,953.50 : x
2. Step 2: Convert to fraction form
   621,042/878,953.50 = 878,953.50/x
3. Step 3: Cross multiply
   621,042x = 878,953.50 × 878,953.50
4. Step 4: Simplify right side
   621,042x = 772,559,255,162.25
5. Step 5: Solve for x
   x = 772,559,255,162.25/621,042
6. Step 6: Final answer
   x = 1,243,972.64