Finding the Third Proportional to 58,680 and 90,912

Step by Step Solution

1. Step 1: Write the proportion equation
   58,680 : 90,912 = 90,912 : x
2. Step 2: Convert to fraction form
   58,680/90,912 = 90,912/x
3. Step 3: Cross multiply
   58,680x = 90,912 × 90,912
4. Step 4: Simplify right side
   58,680x = 8,264,991,744
5. Step 5: Solve for x
   x = 8,264,991,744/58,680
6. Step 6: Final answer
   x = 140,848.53