Finding the Fourth Proportional to 51,680.72, 71,317.32 and 30,460.88

Step by Step Solution

1. Step 1: Write the proportion equation
   51,680.72 : 71,317.32 = 30,460.88 : x
2. Step 2: Convert to fraction form
   51,680.72/71,317.32 = 30,460.88/x
3. Step 3: Cross multiply
   51,680.72x = 71,317.32 × 30,460.88
4. Step 4: Simplify right side
   51,680.72x = 2,172,388,326.44
5. Step 5: Solve for x
   x = 2,172,388,326.44/51,680.72
6. Step 6: Final answer
   x = 42,034.79