Finding the Fourth Proportional to 11,800.63, 17,703.55 and 3,905.61

Step by Step Solution

1. Step 1: Write the proportion equation
   11,800.63 : 17,703.55 = 3,905.61 : x
2. Step 2: Convert to fraction form
   11,800.63/17,703.55 = 3,905.61/x
3. Step 3: Cross multiply
   11,800.63x = 17,703.55 × 3,905.61
4. Step 4: Simplify right side
   11,800.63x = 69,143,100.41
5. Step 5: Solve for x
   x = 69,143,100.41/11,800.63
6. Step 6: Final answer
   x = 5,859.27