Finding the Third Proportional to 72,810 and 103,140

Step by Step Solution

1. Step 1: Write the proportion equation
   72,810 : 103,140 = 103,140 : x
2. Step 2: Convert to fraction form
   72,810/103,140 = 103,140/x
3. Step 3: Cross multiply
   72,810x = 103,140 × 103,140
4. Step 4: Simplify right side
   72,810x = 10,637,859,600
5. Step 5: Solve for x
   x = 10,637,859,600/72,810
6. Step 6: Final answer
   x = 146,104.38