Finding the Third Proportional to 58,453 and 90,408

Step by Step Solution

1. Step 1: Write the proportion equation
   58,453 : 90,408 = 90,408 : x
2. Step 2: Convert to fraction form
   58,453/90,408 = 90,408/x
3. Step 3: Cross multiply
   58,453x = 90,408 × 90,408
4. Step 4: Simplify right side
   58,453x = 8,173,606,464
5. Step 5: Solve for x
   x = 8,173,606,464/58,453
6. Step 6: Final answer
   x = 139,832.11