Finding the Fourth Proportional to 72,804.05, 109,162.98 and 28,378.94

Step by Step Solution

1. Step 1: Write the proportion equation
   72,804.05 : 109,162.98 = 28,378.94 : x
2. Step 2: Convert to fraction form
   72,804.05/109,162.98 = 28,378.94/x
3. Step 3: Cross multiply
   72,804.05x = 109,162.98 × 28,378.94
4. Step 4: Simplify right side
   72,804.05x = 3,097,929,659.64
5. Step 5: Solve for x
   x = 3,097,929,659.64/72,804.05
6. Step 6: Final answer
   x = 42,551.61