Finding the Fourth Proportional to 72,456.20, 101,623 and 72,456.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,456.20 : 101,623 = 72,456.20 : x
2. Step 2: Convert to fraction form
   72,456.20/101,623 = 72,456.20/x
3. Step 3: Cross multiply
   72,456.20x = 101,623 × 72,456.20
4. Step 4: Simplify right side
   72,456.20x = 7,363,216,412.60
5. Step 5: Solve for x
   x = 7,363,216,412.60/72,456.20
6. Step 6: Final answer
   x = 101,623