Finding the Fourth Proportional to 28,666.47, 42,998.18 and 8,942.76

Step by Step Solution

1. Step 1: Write the proportion equation
   28,666.47 : 42,998.18 = 8,942.76 : x
2. Step 2: Convert to fraction form
   28,666.47/42,998.18 = 8,942.76/x
3. Step 3: Cross multiply
   28,666.47x = 42,998.18 × 8,942.76
4. Step 4: Simplify right side
   28,666.47x = 384,522,404.18
5. Step 5: Solve for x
   x = 384,522,404.18/28,666.47
6. Step 6: Final answer
   x = 13,413.66