Finding the Third Proportional to 455,859 and 991,988.50

Step by Step Solution

1. Step 1: Write the proportion equation
   455,859 : 991,988.50 = 991,988.50 : x
2. Step 2: Convert to fraction form
   455,859/991,988.50 = 991,988.50/x
3. Step 3: Cross multiply
   455,859x = 991,988.50 × 991,988.50
4. Step 4: Simplify right side
   455,859x = 984,041,184,132.25
5. Step 5: Solve for x
   x = 984,041,184,132.25/455,859
6. Step 6: Final answer
   x = 2,158,652.53