Finding the Fourth Proportional to 72,144.36, 99,570.83 and 45,290.73

Step by Step Solution

1. Step 1: Write the proportion equation
   72,144.36 : 99,570.83 = 45,290.73 : x
2. Step 2: Convert to fraction form
   72,144.36/99,570.83 = 45,290.73/x
3. Step 3: Cross multiply
   72,144.36x = 99,570.83 × 45,290.73
4. Step 4: Simplify right side
   72,144.36x = 4,509,635,577.41
5. Step 5: Solve for x
   x = 4,509,635,577.41/72,144.36
6. Step 6: Final answer
   x = 62,508.50