Finding the Fourth Proportional to 28,211.76, 42,312.15 and 10,683

Step by Step Solution

1. Step 1: Write the proportion equation
   28,211.76 : 42,312.15 = 10,683 : x
2. Step 2: Convert to fraction form
   28,211.76/42,312.15 = 10,683/x
3. Step 3: Cross multiply
   28,211.76x = 42,312.15 × 10,683
4. Step 4: Simplify right side
   28,211.76x = 452,020,698.45
5. Step 5: Solve for x
   x = 452,020,698.45/28,211.76
6. Step 6: Final answer
   x = 16,022.42