Finding the Third Proportional to 71,388 and 148,392

Step by Step Solution

1. Step 1: Write the proportion equation
   71,388 : 148,392 = 148,392 : x
2. Step 2: Convert to fraction form
   71,388/148,392 = 148,392/x
3. Step 3: Cross multiply
   71,388x = 148,392 × 148,392
4. Step 4: Simplify right side
   71,388x = 22,020,185,664
5. Step 5: Solve for x
   x = 22,020,185,664/71,388
6. Step 6: Final answer
   x = 308,457.80