Finding the Third Proportional to 990,406.50 and 2,170,109.25

Step by Step Solution

1. Step 1: Write the proportion equation
   990,406.50 : 2,170,109.25 = 2,170,109.25 : x
2. Step 2: Convert to fraction form
   990,406.50/2,170,109.25 = 2,170,109.25/x
3. Step 3: Cross multiply
   990,406.50x = 2,170,109.25 × 2,170,109.25
4. Step 4: Simplify right side
   990,406.50x = 4,709,374,156,935.56
5. Step 5: Solve for x
   x = 4,709,374,156,935.56/990,406.50
6. Step 6: Final answer
   x = 4,754,991.16