Finding the Fourth Proportional to 12,706.82, 19,058.86 and 4,385.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,706.82 : 19,058.86 = 4,385.89 : x
2. Step 2: Convert to fraction form
   12,706.82/19,058.86 = 4,385.89/x
3. Step 3: Cross multiply
   12,706.82x = 19,058.86 × 4,385.89
4. Step 4: Simplify right side
   12,706.82x = 83,590,063.49
5. Step 5: Solve for x
   x = 83,590,063.49/12,706.82
6. Step 6: Final answer
   x = 6,578.36