Finding the Fourth Proportional to 22,709.64, 31,339.98 and 13,758.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,709.64 : 31,339.98 = 13,758.78 : x
2. Step 2: Convert to fraction form
   22,709.64/31,339.98 = 13,758.78/x
3. Step 3: Cross multiply
   22,709.64x = 31,339.98 × 13,758.78
4. Step 4: Simplify right side
   22,709.64x = 431,199,890.02
5. Step 5: Solve for x
   x = 431,199,890.02/22,709.64
6. Step 6: Final answer
   x = 18,987.53