Finding the Fourth Proportional to 28,162.50, 42,243.75 and 7,386

Step by Step Solution

1. Step 1: Write the proportion equation
   28,162.50 : 42,243.75 = 7,386 : x
2. Step 2: Convert to fraction form
   28,162.50/42,243.75 = 7,386/x
3. Step 3: Cross multiply
   28,162.50x = 42,243.75 × 7,386
4. Step 4: Simplify right side
   28,162.50x = 312,012,337.50
5. Step 5: Solve for x
   x = 312,012,337.50/28,162.50
6. Step 6: Final answer
   x = 11,079