Finding the Third Proportional to 142,638.47 and 305,521.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,638.47 : 305,521.88 = 305,521.88 : x
2. Step 2: Convert to fraction form
   142,638.47/305,521.88 = 305,521.88/x
3. Step 3: Cross multiply
   142,638.47x = 305,521.88 × 305,521.88
4. Step 4: Simplify right side
   142,638.47x = 93,343,616,103.52
5. Step 5: Solve for x
   x = 93,343,616,103.52/142,638.47
6. Step 6: Final answer
   x = 654,407.03