Finding the Third Proportional to 300,045 and 455,902.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,045 : 455,902.50 = 455,902.50 : x
2. Step 2: Convert to fraction form
   300,045/455,902.50 = 455,902.50/x
3. Step 3: Cross multiply
   300,045x = 455,902.50 × 455,902.50
4. Step 4: Simplify right side
   300,045x = 207,847,089,506.25
5. Step 5: Solve for x
   x = 207,847,089,506.25/300,045
6. Step 6: Final answer
   x = 692,719.72