Finding the Fourth Proportional to 30,680.91, 42,329.47 and 25,005.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,680.91 : 42,329.47 = 25,005.91 : x
2. Step 2: Convert to fraction form
   30,680.91/42,329.47 = 25,005.91/x
3. Step 3: Cross multiply
   30,680.91x = 42,329.47 × 25,005.91
4. Step 4: Simplify right side
   30,680.91x = 1,058,486,917.17
5. Step 5: Solve for x
   x = 1,058,486,917.17/30,680.91
6. Step 6: Final answer
   x = 34,499.85