Finding the Third Proportional to 70,420.50 and 145,488

Step by Step Solution

1. Step 1: Write the proportion equation
   70,420.50 : 145,488 = 145,488 : x
2. Step 2: Convert to fraction form
   70,420.50/145,488 = 145,488/x
3. Step 3: Cross multiply
   70,420.50x = 145,488 × 145,488
4. Step 4: Simplify right side
   70,420.50x = 21,166,758,144
5. Step 5: Solve for x
   x = 21,166,758,144/70,420.50
6. Step 6: Final answer
   x = 300,576.65