Finding the Third Proportional to 253,230 and 386,275.50

Step by Step Solution

1. Step 1: Write the proportion equation
   253,230 : 386,275.50 = 386,275.50 : x
2. Step 2: Convert to fraction form
   253,230/386,275.50 = 386,275.50/x
3. Step 3: Cross multiply
   253,230x = 386,275.50 × 386,275.50
4. Step 4: Simplify right side
   253,230x = 149,208,761,900.25
5. Step 5: Solve for x
   x = 149,208,761,900.25/253,230
6. Step 6: Final answer
   x = 589,222.30