Finding the Third Proportional to 45,840 and 61,240

Step by Step Solution

1. Step 1: Write the proportion equation
   45,840 : 61,240 = 61,240 : x
2. Step 2: Convert to fraction form
   45,840/61,240 = 61,240/x
3. Step 3: Cross multiply
   45,840x = 61,240 × 61,240
4. Step 4: Simplify right side
   45,840x = 3,750,337,600
5. Step 5: Solve for x
   x = 3,750,337,600/45,840
6. Step 6: Final answer
   x = 81,813.65