Finding the Third Proportional to 309,956.63 and 417,058.88

Step by Step Solution

1. Step 1: Write the proportion equation
   309,956.63 : 417,058.88 = 417,058.88 : x
2. Step 2: Convert to fraction form
   309,956.63/417,058.88 = 417,058.88/x
3. Step 3: Cross multiply
   309,956.63x = 417,058.88 × 417,058.88
4. Step 4: Simplify right side
   309,956.63x = 173,938,105,216.27
5. Step 5: Solve for x
   x = 173,938,105,216.27/309,956.63
6. Step 6: Final answer
   x = 561,169.18