Finding the Third Proportional to 200,530 and 428,127.50

Step by Step Solution

1. Step 1: Write the proportion equation
   200,530 : 428,127.50 = 428,127.50 : x
2. Step 2: Convert to fraction form
   200,530/428,127.50 = 428,127.50/x
3. Step 3: Cross multiply
   200,530x = 428,127.50 × 428,127.50
4. Step 4: Simplify right side
   200,530x = 183,293,156,256.25
5. Step 5: Solve for x
   x = 183,293,156,256.25/200,530
6. Step 6: Final answer
   x = 914,043.57