Finding the Fourth Proportional to 72,638.52, 108,964.86 and 28,268.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,638.52 : 108,964.86 = 28,268.88 : x
2. Step 2: Convert to fraction form
   72,638.52/108,964.86 = 28,268.88/x
3. Step 3: Cross multiply
   72,638.52x = 108,964.86 × 28,268.88
4. Step 4: Simplify right side
   72,638.52x = 3,080,314,551.56
5. Step 5: Solve for x
   x = 3,080,314,551.56/72,638.52
6. Step 6: Final answer
   x = 42,406.08