Finding the Third Proportional to 58,419 and 90,211.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,419 : 90,211.50 = 90,211.50 : x
2. Step 2: Convert to fraction form
   58,419/90,211.50 = 90,211.50/x
3. Step 3: Cross multiply
   58,419x = 90,211.50 × 90,211.50
4. Step 4: Simplify right side
   58,419x = 8,138,114,732.25
5. Step 5: Solve for x
   x = 8,138,114,732.25/58,419
6. Step 6: Final answer
   x = 139,305.96