Finding the Third Proportional to 30,457.75 and 45,686.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,457.75 : 45,686.50 = 45,686.50 : x
2. Step 2: Convert to fraction form
   30,457.75/45,686.50 = 45,686.50/x
3. Step 3: Cross multiply
   30,457.75x = 45,686.50 × 45,686.50
4. Step 4: Simplify right side
   30,457.75x = 2,087,256,282.25
5. Step 5: Solve for x
   x = 2,087,256,282.25/30,457.75
6. Step 6: Final answer
   x = 68,529.56