Finding the Fourth Proportional to 28,116.45, 42,171.98 and 11,477.97

Step by Step Solution

1. Step 1: Write the proportion equation
   28,116.45 : 42,171.98 = 11,477.97 : x
2. Step 2: Convert to fraction form
   28,116.45/42,171.98 = 11,477.97/x
3. Step 3: Cross multiply
   28,116.45x = 42,171.98 × 11,477.97
4. Step 4: Simplify right side
   28,116.45x = 484,048,663.89
5. Step 5: Solve for x
   x = 484,048,663.89/28,116.45
6. Step 6: Final answer
   x = 17,215.85