Finding the Third Proportional to 152,158 and 335,420

Step by Step Solution

1. Step 1: Write the proportion equation
   152,158 : 335,420 = 335,420 : x
2. Step 2: Convert to fraction form
   152,158/335,420 = 335,420/x
3. Step 3: Cross multiply
   152,158x = 335,420 × 335,420
4. Step 4: Simplify right side
   152,158x = 112,506,576,400
5. Step 5: Solve for x
   x = 112,506,576,400/152,158
6. Step 6: Final answer
   x = 739,406.25