Finding the Third Proportional to 980,800.50 and 2,111,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   980,800.50 : 2,111,890.50 = 2,111,890.50 : x
2. Step 2: Convert to fraction form
   980,800.50/2,111,890.50 = 2,111,890.50/x
3. Step 3: Cross multiply
   980,800.50x = 2,111,890.50 × 2,111,890.50
4. Step 4: Simplify right side
   980,800.50x = 4,460,081,483,990.25
5. Step 5: Solve for x
   x = 4,460,081,483,990.25/980,800.50
6. Step 6: Final answer
   x = 4,547,389.08