Finding the Third Proportional to 59,780 and 90,118

Step by Step Solution

1. Step 1: Write the proportion equation
   59,780 : 90,118 = 90,118 : x
2. Step 2: Convert to fraction form
   59,780/90,118 = 90,118/x
3. Step 3: Cross multiply
   59,780x = 90,118 × 90,118
4. Step 4: Simplify right side
   59,780x = 8,121,253,924
5. Step 5: Solve for x
   x = 8,121,253,924/59,780
6. Step 6: Final answer
   x = 135,852.36