Finding the Fourth Proportional to 15,929.37, 21,980.61 and 8,758.10

Step by Step Solution

1. Step 1: Write the proportion equation
   15,929.37 : 21,980.61 = 8,758.10 : x
2. Step 2: Convert to fraction form
   15,929.37/21,980.61 = 8,758.10/x
3. Step 3: Cross multiply
   15,929.37x = 21,980.61 × 8,758.10
4. Step 4: Simplify right side
   15,929.37x = 192,508,380.44
5. Step 5: Solve for x
   x = 192,508,380.44/15,929.37
6. Step 6: Final answer
   x = 12,085.12