Finding the Fourth Proportional to 11,439.77, 17,158.28 and 5,193.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,439.77 : 17,158.28 = 5,193.18 : x
2. Step 2: Convert to fraction form
   11,439.77/17,158.28 = 5,193.18/x
3. Step 3: Cross multiply
   11,439.77x = 17,158.28 × 5,193.18
4. Step 4: Simplify right side
   11,439.77x = 89,106,010.56
5. Step 5: Solve for x
   x = 89,106,010.56/11,439.77
6. Step 6: Final answer
   x = 7,789.15