Finding the Third Proportional to 291,645 and 456,907.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,645 : 456,907.50 = 456,907.50 : x
2. Step 2: Convert to fraction form
   291,645/456,907.50 = 456,907.50/x
3. Step 3: Cross multiply
   291,645x = 456,907.50 × 456,907.50
4. Step 4: Simplify right side
   291,645x = 208,764,463,556.25
5. Step 5: Solve for x
   x = 208,764,463,556.25/291,645
6. Step 6: Final answer
   x = 715,817.05