Finding the Third Proportional to 58,644 and 90,909

Step by Step Solution

1. Step 1: Write the proportion equation
   58,644 : 90,909 = 90,909 : x
2. Step 2: Convert to fraction form
   58,644/90,909 = 90,909/x
3. Step 3: Cross multiply
   58,644x = 90,909 × 90,909
4. Step 4: Simplify right side
   58,644x = 8,264,446,281
5. Step 5: Solve for x
   x = 8,264,446,281/58,644
6. Step 6: Final answer
   x = 140,925.69