Finding the Fourth Proportional to 11,411.48, 15,820.01 and 10,811.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,411.48 : 15,820.01 = 10,811.56 : x
2. Step 2: Convert to fraction form
   11,411.48/15,820.01 = 10,811.56/x
3. Step 3: Cross multiply
   11,411.48x = 15,820.01 × 10,811.56
4. Step 4: Simplify right side
   11,411.48x = 171,038,987.32
5. Step 5: Solve for x
   x = 171,038,987.32/11,411.48
6. Step 6: Final answer
   x = 14,988.33