Finding the Third Proportional to 59,115 and 90,855

Step by Step Solution

1. Step 1: Write the proportion equation
   59,115 : 90,855 = 90,855 : x
2. Step 2: Convert to fraction form
   59,115/90,855 = 90,855/x
3. Step 3: Cross multiply
   59,115x = 90,855 × 90,855
4. Step 4: Simplify right side
   59,115x = 8,254,631,025
5. Step 5: Solve for x
   x = 8,254,631,025/59,115
6. Step 6: Final answer
   x = 139,636.83