Finding the Fourth Proportional to 11,817.18, 17,736.71 and 5,977.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,817.18 : 17,736.71 = 5,977.89 : x
2. Step 2: Convert to fraction form
   11,817.18/17,736.71 = 5,977.89/x
3. Step 3: Cross multiply
   11,817.18x = 17,736.71 × 5,977.89
4. Step 4: Simplify right side
   11,817.18x = 106,028,071.45
5. Step 5: Solve for x
   x = 106,028,071.45/11,817.18
6. Step 6: Final answer
   x = 8,972.37