Finding the Fourth Proportional to 11,870, 16,380.42 and 8,473.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,870 : 16,380.42 = 8,473.28 : x
2. Step 2: Convert to fraction form
   11,870/16,380.42 = 8,473.28/x
3. Step 3: Cross multiply
   11,870x = 16,380.42 × 8,473.28
4. Step 4: Simplify right side
   11,870x = 138,795,885.18
5. Step 5: Solve for x
   x = 138,795,885.18/11,870
6. Step 6: Final answer
   x = 11,693.00