Finding the Third Proportional to 42,903 and 89,910

Step by Step Solution

1. Step 1: Write the proportion equation
   42,903 : 89,910 = 89,910 : x
2. Step 2: Convert to fraction form
   42,903/89,910 = 89,910/x
3. Step 3: Cross multiply
   42,903x = 89,910 × 89,910
4. Step 4: Simplify right side
   42,903x = 8,083,808,100
5. Step 5: Solve for x
   x = 8,083,808,100/42,903
6. Step 6: Final answer
   x = 188,420.58