Finding the Fourth Proportional to 16,890.50, 25,339.54 and 7,656.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,890.50 : 25,339.54 = 7,656.50 : x
2. Step 2: Convert to fraction form
   16,890.50/25,339.54 = 7,656.50/x
3. Step 3: Cross multiply
   16,890.50x = 25,339.54 × 7,656.50
4. Step 4: Simplify right side
   16,890.50x = 194,012,188.01
5. Step 5: Solve for x
   x = 194,012,188.01/16,890.50
6. Step 6: Final answer
   x = 11,486.47