Finding the Third Proportional to 259,528.50 and 563,121

Step by Step Solution

1. Step 1: Write the proportion equation
   259,528.50 : 563,121 = 563,121 : x
2. Step 2: Convert to fraction form
   259,528.50/563,121 = 563,121/x
3. Step 3: Cross multiply
   259,528.50x = 563,121 × 563,121
4. Step 4: Simplify right side
   259,528.50x = 317,105,260,641
5. Step 5: Solve for x
   x = 317,105,260,641/259,528.50
6. Step 6: Final answer
   x = 1,221,851.40