Finding the Fourth Proportional to 15,767.42, 21,758.71 and 8,693.86

Step by Step Solution

1. Step 1: Write the proportion equation
   15,767.42 : 21,758.71 = 8,693.86 : x
2. Step 2: Convert to fraction form
   15,767.42/21,758.71 = 8,693.86/x
3. Step 3: Cross multiply
   15,767.42x = 21,758.71 × 8,693.86
4. Step 4: Simplify right side
   15,767.42x = 189,167,178.52
5. Step 5: Solve for x
   x = 189,167,178.52/15,767.42
6. Step 6: Final answer
   x = 11,997.35