Finding the Fourth Proportional to 11,356.10, 17,038.88 and 5,111.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,356.10 : 17,038.88 = 5,111.81 : x
2. Step 2: Convert to fraction form
   11,356.10/17,038.88 = 5,111.81/x
3. Step 3: Cross multiply
   11,356.10x = 17,038.88 × 5,111.81
4. Step 4: Simplify right side
   11,356.10x = 87,099,491.61
5. Step 5: Solve for x
   x = 87,099,491.61/11,356.10
6. Step 6: Final answer
   x = 7,669.84