Finding the Third Proportional to 455,899.50 and 989,073

Step by Step Solution

1. Step 1: Write the proportion equation
   455,899.50 : 989,073 = 989,073 : x
2. Step 2: Convert to fraction form
   455,899.50/989,073 = 989,073/x
3. Step 3: Cross multiply
   455,899.50x = 989,073 × 989,073
4. Step 4: Simplify right side
   455,899.50x = 978,265,399,329
5. Step 5: Solve for x
   x = 978,265,399,329/455,899.50
6. Step 6: Final answer
   x = 2,145,791.78