Finding the Third Proportional to 433,442.25 and 690,300

Step by Step Solution

1. Step 1: Write the proportion equation
   433,442.25 : 690,300 = 690,300 : x
2. Step 2: Convert to fraction form
   433,442.25/690,300 = 690,300/x
3. Step 3: Cross multiply
   433,442.25x = 690,300 × 690,300
4. Step 4: Simplify right side
   433,442.25x = 476,514,090,000
5. Step 5: Solve for x
   x = 476,514,090,000/433,442.25
6. Step 6: Final answer
   x = 1,099,371.58