Finding the Third Proportional to 30,953.81 and 67,820.63

Step by Step Solution

1. Step 1: Write the proportion equation
   30,953.81 : 67,820.63 = 67,820.63 : x
2. Step 2: Convert to fraction form
   30,953.81/67,820.63 = 67,820.63/x
3. Step 3: Cross multiply
   30,953.81x = 67,820.63 × 67,820.63
4. Step 4: Simplify right side
   30,953.81x = 4,599,637,175.39
5. Step 5: Solve for x
   x = 4,599,637,175.39/30,953.81
6. Step 6: Final answer
   x = 148,596.79