Finding the Third Proportional to 30,152.81 and 64,309.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,152.81 : 64,309.78 = 64,309.78 : x
2. Step 2: Convert to fraction form
   30,152.81/64,309.78 = 64,309.78/x
3. Step 3: Cross multiply
   30,152.81x = 64,309.78 × 64,309.78
4. Step 4: Simplify right side
   30,152.81x = 4,135,747,964.42
5. Step 5: Solve for x
   x = 4,135,747,964.42/30,152.81
6. Step 6: Final answer
   x = 137,159.61