Finding the Fourth Proportional to 10,790.87, 14,890.33 and 7,959.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,790.87 : 14,890.33 = 7,959.78 : x
2. Step 2: Convert to fraction form
   10,790.87/14,890.33 = 7,959.78/x
3. Step 3: Cross multiply
   10,790.87x = 14,890.33 × 7,959.78
4. Step 4: Simplify right side
   10,790.87x = 118,523,705.04
5. Step 5: Solve for x
   x = 118,523,705.04/10,790.87
6. Step 6: Final answer
   x = 10,983.70