Finding the Third Proportional to 613,625.63 and 878,404.50

Step by Step Solution

1. Step 1: Write the proportion equation
   613,625.63 : 878,404.50 = 878,404.50 : x
2. Step 2: Convert to fraction form
   613,625.63/878,404.50 = 878,404.50/x
3. Step 3: Cross multiply
   613,625.63x = 878,404.50 × 878,404.50
4. Step 4: Simplify right side
   613,625.63x = 771,594,465,620.25
5. Step 5: Solve for x
   x = 771,594,465,620.25/613,625.63
6. Step 6: Final answer
   x = 1,257,435.21