Finding the Third Proportional to 57,456 and 90,288

Step by Step Solution

1. Step 1: Write the proportion equation
   57,456 : 90,288 = 90,288 : x
2. Step 2: Convert to fraction form
   57,456/90,288 = 90,288/x
3. Step 3: Cross multiply
   57,456x = 90,288 × 90,288
4. Step 4: Simplify right side
   57,456x = 8,151,922,944
5. Step 5: Solve for x
   x = 8,151,922,944/57,456
6. Step 6: Final answer
   x = 141,881.14