Finding the Fourth Proportional to 28,146.24, 42,230.52 and 10,620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,146.24 : 42,230.52 = 10,620.72 : x
2. Step 2: Convert to fraction form
   28,146.24/42,230.52 = 10,620.72/x
3. Step 3: Cross multiply
   28,146.24x = 42,230.52 × 10,620.72
4. Step 4: Simplify right side
   28,146.24x = 448,518,528.37
5. Step 5: Solve for x
   x = 448,518,528.37/28,146.24
6. Step 6: Final answer
   x = 15,935.29