Finding the Fourth Proportional to 13,005.89, 19,510.86 and 4,238.77

Step by Step Solution

1. Step 1: Write the proportion equation
   13,005.89 : 19,510.86 = 4,238.77 : x
2. Step 2: Convert to fraction form
   13,005.89/19,510.86 = 4,238.77/x
3. Step 3: Cross multiply
   13,005.89x = 19,510.86 × 4,238.77
4. Step 4: Simplify right side
   13,005.89x = 82,702,048.04
5. Step 5: Solve for x
   x = 82,702,048.04/13,005.89
6. Step 6: Final answer
   x = 6,358.81