Finding the Fourth Proportional to 11,820.91, 17,679.08 and 10,513.83

Step by Step Solution

1. Step 1: Write the proportion equation
   11,820.91 : 17,679.08 = 10,513.83 : x
2. Step 2: Convert to fraction form
   11,820.91/17,679.08 = 10,513.83/x
3. Step 3: Cross multiply
   11,820.91x = 17,679.08 × 10,513.83
4. Step 4: Simplify right side
   11,820.91x = 185,874,826.74
5. Step 5: Solve for x
   x = 185,874,826.74/11,820.91
6. Step 6: Final answer
   x = 15,724.25