Finding the Fourth Proportional to 72,828.38, 109,268.69 and 28,486.95

Step by Step Solution

1. Step 1: Write the proportion equation
   72,828.38 : 109,268.69 = 28,486.95 : x
2. Step 2: Convert to fraction form
   72,828.38/109,268.69 = 28,486.95/x
3. Step 3: Cross multiply
   72,828.38x = 109,268.69 × 28,486.95
4. Step 4: Simplify right side
   72,828.38x = 3,112,731,566.16
5. Step 5: Solve for x
   x = 3,112,731,566.16/72,828.38
6. Step 6: Final answer
   x = 42,740.64