Finding the Third Proportional to 455,858.25 and 991,987.50

Step by Step Solution

1. Step 1: Write the proportion equation
   455,858.25 : 991,987.50 = 991,987.50 : x
2. Step 2: Convert to fraction form
   455,858.25/991,987.50 = 991,987.50/x
3. Step 3: Cross multiply
   455,858.25x = 991,987.50 × 991,987.50
4. Step 4: Simplify right side
   455,858.25x = 984,039,200,156.25
5. Step 5: Solve for x
   x = 984,039,200,156.25/455,858.25
6. Step 6: Final answer
   x = 2,158,651.73