Finding the Fourth Proportional to 28,131.88, 42,181.83 and 11,472.40

Step by Step Solution

1. Step 1: Write the proportion equation
   28,131.88 : 42,181.83 = 11,472.40 : x
2. Step 2: Convert to fraction form
   28,131.88/42,181.83 = 11,472.40/x
3. Step 3: Cross multiply
   28,131.88x = 42,181.83 × 11,472.40
4. Step 4: Simplify right side
   28,131.88x = 483,926,826.49
5. Step 5: Solve for x
   x = 483,926,826.49/28,131.88
6. Step 6: Final answer
   x = 17,202.08