Finding the Third Proportional to 287,342 and 433,200

Step by Step Solution

1. Step 1: Write the proportion equation
   287,342 : 433,200 = 433,200 : x
2. Step 2: Convert to fraction form
   287,342/433,200 = 433,200/x
3. Step 3: Cross multiply
   287,342x = 433,200 × 433,200
4. Step 4: Simplify right side
   287,342x = 187,662,240,000
5. Step 5: Solve for x
   x = 187,662,240,000/287,342
6. Step 6: Final answer
   x = 653,097.15