Finding the Fourth Proportional to 28,151.69, 42,234.82 and 10,621.67

Step by Step Solution

1. Step 1: Write the proportion equation
   28,151.69 : 42,234.82 = 10,621.67 : x
2. Step 2: Convert to fraction form
   28,151.69/42,234.82 = 10,621.67/x
3. Step 3: Cross multiply
   28,151.69x = 42,234.82 × 10,621.67
4. Step 4: Simplify right side
   28,151.69x = 448,604,082.82
5. Step 5: Solve for x
   x = 448,604,082.82/28,151.69
6. Step 6: Final answer
   x = 15,935.25