Finding the Third Proportional to 196,159.78 and 415,862.72

Step by Step Solution

1. Step 1: Write the proportion equation
   196,159.78 : 415,862.72 = 415,862.72 : x
2. Step 2: Convert to fraction form
   196,159.78/415,862.72 = 415,862.72/x
3. Step 3: Cross multiply
   196,159.78x = 415,862.72 × 415,862.72
4. Step 4: Simplify right side
   196,159.78x = 172,941,800,846.14
5. Step 5: Solve for x
   x = 172,941,800,846.14/196,159.78
6. Step 6: Final answer
   x = 881,637.41