Finding the Third Proportional to 172,499.63 and 264,216.94

Step by Step Solution

1. Step 1: Write the proportion equation
   172,499.63 : 264,216.94 = 264,216.94 : x
2. Step 2: Convert to fraction form
   172,499.63/264,216.94 = 264,216.94/x
3. Step 3: Cross multiply
   172,499.63x = 264,216.94 × 264,216.94
4. Step 4: Simplify right side
   172,499.63x = 69,810,590,061.88
5. Step 5: Solve for x
   x = 69,810,590,061.88/172,499.63
6. Step 6: Final answer
   x = 404,699.95