Finding the Fourth Proportional to 28,609.50, 42,920.74 and 10,141.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,609.50 : 42,920.74 = 10,141.50 : x
2. Step 2: Convert to fraction form
   28,609.50/42,920.74 = 10,141.50/x
3. Step 3: Cross multiply
   28,609.50x = 42,920.74 × 10,141.50
4. Step 4: Simplify right side
   28,609.50x = 435,280,684.71
5. Step 5: Solve for x
   x = 435,280,684.71/28,609.50
6. Step 6: Final answer
   x = 15,214.55