Finding the Third Proportional to 70,485.50 and 147,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   70,485.50 : 147,890.50 = 147,890.50 : x
2. Step 2: Convert to fraction form
   70,485.50/147,890.50 = 147,890.50/x
3. Step 3: Cross multiply
   70,485.50x = 147,890.50 × 147,890.50
4. Step 4: Simplify right side
   70,485.50x = 21,871,599,990.25
5. Step 5: Solve for x
   x = 21,871,599,990.25/70,485.50
6. Step 6: Final answer
   x = 310,299.28