Finding the Fourth Proportional to 30,408.51, 42,078.78 and 25,925.16

Step by Step Solution

1. Step 1: Write the proportion equation
   30,408.51 : 42,078.78 = 25,925.16 : x
2. Step 2: Convert to fraction form
   30,408.51/42,078.78 = 25,925.16/x
3. Step 3: Cross multiply
   30,408.51x = 42,078.78 × 25,925.16
4. Step 4: Simplify right side
   30,408.51x = 1,090,899,104.10
5. Step 5: Solve for x
   x = 1,090,899,104.10/30,408.51
6. Step 6: Final answer
   x = 35,874.80