Finding the Third Proportional to 553,338 and 830,011.50

Step by Step Solution

1. Step 1: Write the proportion equation
   553,338 : 830,011.50 = 830,011.50 : x
2. Step 2: Convert to fraction form
   553,338/830,011.50 = 830,011.50/x
3. Step 3: Cross multiply
   553,338x = 830,011.50 × 830,011.50
4. Step 4: Simplify right side
   553,338x = 688,919,090,132.25
5. Step 5: Solve for x
   x = 688,919,090,132.25/553,338
6. Step 6: Final answer
   x = 1,245,024.00