Finding the Third Proportional to 420,420 and 987,001.50

Step by Step Solution

1. Step 1: Write the proportion equation
   420,420 : 987,001.50 = 987,001.50 : x
2. Step 2: Convert to fraction form
   420,420/987,001.50 = 987,001.50/x
3. Step 3: Cross multiply
   420,420x = 987,001.50 × 987,001.50
4. Step 4: Simplify right side
   420,420x = 974,171,961,002.25
5. Step 5: Solve for x
   x = 974,171,961,002.25/420,420
6. Step 6: Final answer
   x = 2,317,139.91