Finding the Fourth Proportional to 72,579, 108,790.74 and 30,448.47

Step by Step Solution

1. Step 1: Write the proportion equation
   72,579 : 108,790.74 = 30,448.47 : x
2. Step 2: Convert to fraction form
   72,579/108,790.74 = 30,448.47/x
3. Step 3: Cross multiply
   72,579x = 108,790.74 × 30,448.47
4. Step 4: Simplify right side
   72,579x = 3,312,511,583.17
5. Step 5: Solve for x
   x = 3,312,511,583.17/72,579
6. Step 6: Final answer
   x = 45,640.08