Finding the Third Proportional to 30,620.53 and 45,930.80

Step by Step Solution

1. Step 1: Write the proportion equation
   30,620.53 : 45,930.80 = 45,930.80 : x
2. Step 2: Convert to fraction form
   30,620.53/45,930.80 = 45,930.80/x
3. Step 3: Cross multiply
   30,620.53x = 45,930.80 × 45,930.80
4. Step 4: Simplify right side
   30,620.53x = 2,109,638,101.57
5. Step 5: Solve for x
   x = 2,109,638,101.57/30,620.53
6. Step 6: Final answer
   x = 68,896.20