Finding the Fourth Proportional to 25,156.84, 34,716.36 and 13,978.84

Step by Step Solution

1. Step 1: Write the proportion equation
   25,156.84 : 34,716.36 = 13,978.84 : x
2. Step 2: Convert to fraction form
   25,156.84/34,716.36 = 13,978.84/x
3. Step 3: Cross multiply
   25,156.84x = 34,716.36 × 13,978.84
4. Step 4: Simplify right side
   25,156.84x = 485,294,441.82
5. Step 5: Solve for x
   x = 485,294,441.82/25,156.84
6. Step 6: Final answer
   x = 19,290.76