Finding the Fourth Proportional to 25,043.58, 34,518.15 and 19,991.61

Step by Step Solution

1. Step 1: Write the proportion equation
   25,043.58 : 34,518.15 = 19,991.61 : x
2. Step 2: Convert to fraction form
   25,043.58/34,518.15 = 19,991.61/x
3. Step 3: Cross multiply
   25,043.58x = 34,518.15 × 19,991.61
4. Step 4: Simplify right side
   25,043.58x = 690,073,392.72
5. Step 5: Solve for x
   x = 690,073,392.72/25,043.58
6. Step 6: Final answer
   x = 27,554.90