Finding the Fourth Proportional to 72,659.40, 108,908.10 and 28,271.40

Step by Step Solution

1. Step 1: Write the proportion equation
   72,659.40 : 108,908.10 = 28,271.40 : x
2. Step 2: Convert to fraction form
   72,659.40/108,908.10 = 28,271.40/x
3. Step 3: Cross multiply
   72,659.40x = 108,908.10 × 28,271.40
4. Step 4: Simplify right side
   72,659.40x = 3,078,984,458.34
5. Step 5: Solve for x
   x = 3,078,984,458.34/72,659.40
6. Step 6: Final answer
   x = 42,375.58