Finding the Third Proportional to 455,089 and 612,637.50

Step by Step Solution

1. Step 1: Write the proportion equation
   455,089 : 612,637.50 = 612,637.50 : x
2. Step 2: Convert to fraction form
   455,089/612,637.50 = 612,637.50/x
3. Step 3: Cross multiply
   455,089x = 612,637.50 × 612,637.50
4. Step 4: Simplify right side
   455,089x = 375,324,706,406.25
5. Step 5: Solve for x
   x = 375,324,706,406.25/455,089
6. Step 6: Final answer
   x = 824,728.14