Finding the Third Proportional to 123,012.19 and 264,890.63

Step by Step Solution

1. Step 1: Write the proportion equation
   123,012.19 : 264,890.63 = 264,890.63 : x
2. Step 2: Convert to fraction form
   123,012.19/264,890.63 = 264,890.63/x
3. Step 3: Cross multiply
   123,012.19x = 264,890.63 × 264,890.63
4. Step 4: Simplify right side
   123,012.19x = 70,167,043,212.89
5. Step 5: Solve for x
   x = 70,167,043,212.89/123,012.19
6. Step 6: Final answer
   x = 570,407.25