Finding the Fourth Proportional to 11,116.33, 16,667.17 and 6,663.96

Step by Step Solution

1. Step 1: Write the proportion equation
   11,116.33 : 16,667.17 = 6,663.96 : x
2. Step 2: Convert to fraction form
   11,116.33/16,667.17 = 6,663.96/x
3. Step 3: Cross multiply
   11,116.33x = 16,667.17 × 6,663.96
4. Step 4: Simplify right side
   11,116.33x = 111,069,337.53
5. Step 5: Solve for x
   x = 111,069,337.53/11,116.33
6. Step 6: Final answer
   x = 9,991.55