Finding the Third Proportional to 551,059.50 and 830,640

Step by Step Solution

1. Step 1: Write the proportion equation
   551,059.50 : 830,640 = 830,640 : x
2. Step 2: Convert to fraction form
   551,059.50/830,640 = 830,640/x
3. Step 3: Cross multiply
   551,059.50x = 830,640 × 830,640
4. Step 4: Simplify right side
   551,059.50x = 689,962,809,600
5. Step 5: Solve for x
   x = 689,962,809,600/551,059.50
6. Step 6: Final answer
   x = 1,252,065.90