Finding the Third Proportional to 131,495.91 and 285,408.56

Step by Step Solution

1. Step 1: Write the proportion equation
   131,495.91 : 285,408.56 = 285,408.56 : x
2. Step 2: Convert to fraction form
   131,495.91/285,408.56 = 285,408.56/x
3. Step 3: Cross multiply
   131,495.91x = 285,408.56 × 285,408.56
4. Step 4: Simplify right side
   131,495.91x = 81,458,047,548.32
5. Step 5: Solve for x
   x = 81,458,047,548.32/131,495.91
6. Step 6: Final answer
   x = 619,472.12