Finding the Third Proportional to 267,619.88 and 415,030.69

Step by Step Solution

1. Step 1: Write the proportion equation
   267,619.88 : 415,030.69 = 415,030.69 : x
2. Step 2: Convert to fraction form
   267,619.88/415,030.69 = 415,030.69/x
3. Step 3: Cross multiply
   267,619.88x = 415,030.69 × 415,030.69
4. Step 4: Simplify right side
   267,619.88x = 172,250,471,566.72
5. Step 5: Solve for x
   x = 172,250,471,566.72/267,619.88
6. Step 6: Final answer
   x = 643,638.56