Finding the Third Proportional to 42,918.50 and 61,917

Step by Step Solution

1. Step 1: Write the proportion equation
   42,918.50 : 61,917 = 61,917 : x
2. Step 2: Convert to fraction form
   42,918.50/61,917 = 61,917/x
3. Step 3: Cross multiply
   42,918.50x = 61,917 × 61,917
4. Step 4: Simplify right side
   42,918.50x = 3,833,714,889
5. Step 5: Solve for x
   x = 3,833,714,889/42,918.50
6. Step 6: Final answer
   x = 89,325.46