Finding the Fourth Proportional to 72,740.52, 109,110.38 and 18,705.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,740.52 : 109,110.38 = 18,705.12 : x
2. Step 2: Convert to fraction form
   72,740.52/109,110.38 = 18,705.12/x
3. Step 3: Cross multiply
   72,740.52x = 109,110.38 × 18,705.12
4. Step 4: Simplify right side
   72,740.52x = 2,040,922,751.15
5. Step 5: Solve for x
   x = 2,040,922,751.15/72,740.52
6. Step 6: Final answer
   x = 28,057.58