Finding the Third Proportional to 68,400 and 147,730.50

Step by Step Solution

1. Step 1: Write the proportion equation
   68,400 : 147,730.50 = 147,730.50 : x
2. Step 2: Convert to fraction form
   68,400/147,730.50 = 147,730.50/x
3. Step 3: Cross multiply
   68,400x = 147,730.50 × 147,730.50
4. Step 4: Simplify right side
   68,400x = 21,824,300,630.25
5. Step 5: Solve for x
   x = 21,824,300,630.25/68,400
6. Step 6: Final answer
   x = 319,068.72