Finding the Fourth Proportional to 15,765.07, 21,756.72 and 9,050.71

Step by Step Solution

1. Step 1: Write the proportion equation
   15,765.07 : 21,756.72 = 9,050.71 : x
2. Step 2: Convert to fraction form
   15,765.07/21,756.72 = 9,050.71/x
3. Step 3: Cross multiply
   15,765.07x = 21,756.72 × 9,050.71
4. Step 4: Simplify right side
   15,765.07x = 196,913,763.27
5. Step 5: Solve for x
   x = 196,913,763.27/15,765.07
6. Step 6: Final answer
   x = 12,490.51