Finding the Third Proportional to 420,423.75 and 987,012

Step by Step Solution

1. Step 1: Write the proportion equation
   420,423.75 : 987,012 = 987,012 : x
2. Step 2: Convert to fraction form
   420,423.75/987,012 = 987,012/x
3. Step 3: Cross multiply
   420,423.75x = 987,012 × 987,012
4. Step 4: Simplify right side
   420,423.75x = 974,192,688,144
5. Step 5: Solve for x
   x = 974,192,688,144/420,423.75
6. Step 6: Final answer
   x = 2,317,168.54