Finding the Third Proportional to 43,290 and 65,218.50

Step by Step Solution

1. Step 1: Write the proportion equation
   43,290 : 65,218.50 = 65,218.50 : x
2. Step 2: Convert to fraction form
   43,290/65,218.50 = 65,218.50/x
3. Step 3: Cross multiply
   43,290x = 65,218.50 × 65,218.50
4. Step 4: Simplify right side
   43,290x = 4,253,452,742.25
5. Step 5: Solve for x
   x = 4,253,452,742.25/43,290
6. Step 6: Final answer
   x = 98,254.86