Finding the Fourth Proportional to 19,304.72, 28,925.28 and 17,690.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,304.72 : 28,925.28 = 17,690.72 : x
2. Step 2: Convert to fraction form
   19,304.72/28,925.28 = 17,690.72/x
3. Step 3: Cross multiply
   19,304.72x = 28,925.28 × 17,690.72
4. Step 4: Simplify right side
   19,304.72x = 511,709,029.40
5. Step 5: Solve for x
   x = 511,709,029.40/19,304.72
6. Step 6: Final answer
   x = 26,506.94