Finding the Fourth Proportional to 11,899.18, 16,417.59 and 7,117.17

Step by Step Solution

1. Step 1: Write the proportion equation
   11,899.18 : 16,417.59 = 7,117.17 : x
2. Step 2: Convert to fraction form
   11,899.18/16,417.59 = 7,117.17/x
3. Step 3: Cross multiply
   11,899.18x = 16,417.59 × 7,117.17
4. Step 4: Simplify right side
   11,899.18x = 116,846,779.02
5. Step 5: Solve for x
   x = 116,846,779.02/11,899.18
6. Step 6: Final answer
   x = 9,819.73