Finding the Third Proportional to 58,408 and 89,880

Step by Step Solution

1. Step 1: Write the proportion equation
   58,408 : 89,880 = 89,880 : x
2. Step 2: Convert to fraction form
   58,408/89,880 = 89,880/x
3. Step 3: Cross multiply
   58,408x = 89,880 × 89,880
4. Step 4: Simplify right side
   58,408x = 8,078,414,400
5. Step 5: Solve for x
   x = 8,078,414,400/58,408
6. Step 6: Final answer
   x = 138,310.07