Finding the Fourth Proportional to 28,446.72, 42,679.20 and 11,814.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,446.72 : 42,679.20 = 11,814.72 : x
2. Step 2: Convert to fraction form
   28,446.72/42,679.20 = 11,814.72/x
3. Step 3: Cross multiply
   28,446.72x = 42,679.20 × 11,814.72
4. Step 4: Simplify right side
   28,446.72x = 504,242,797.82
5. Step 5: Solve for x
   x = 504,242,797.82/28,446.72
6. Step 6: Final answer
   x = 17,725.87