Finding the Fourth Proportional to 12,007.17, 17,998.27 and 4,991

Step by Step Solution

1. Step 1: Write the proportion equation
   12,007.17 : 17,998.27 = 4,991 : x
2. Step 2: Convert to fraction form
   12,007.17/17,998.27 = 4,991/x
3. Step 3: Cross multiply
   12,007.17x = 17,998.27 × 4,991
4. Step 4: Simplify right side
   12,007.17x = 89,829,340.62
5. Step 5: Solve for x
   x = 89,829,340.62/12,007.17
6. Step 6: Final answer
   x = 7,481.31