Finding the Fourth Proportional to 30,723.84, 42,390.72 and 25,963.20

Step by Step Solution

1. Step 1: Write the proportion equation
   30,723.84 : 42,390.72 = 25,963.20 : x
2. Step 2: Convert to fraction form
   30,723.84/42,390.72 = 25,963.20/x
3. Step 3: Cross multiply
   30,723.84x = 42,390.72 × 25,963.20
4. Step 4: Simplify right side
   30,723.84x = 1,100,598,741.50
5. Step 5: Solve for x
   x = 1,100,598,741.50/30,723.84
6. Step 6: Final answer
   x = 35,822.30