Finding the Fourth Proportional to 12,705.59, 19,059.30 and 4,385.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.59 : 19,059.30 = 4,385.48 : x
2. Step 2: Convert to fraction form
   12,705.59/19,059.30 = 4,385.48/x
3. Step 3: Cross multiply
   12,705.59x = 19,059.30 × 4,385.48
4. Step 4: Simplify right side
   12,705.59x = 83,584,178.96
5. Step 5: Solve for x
   x = 83,584,178.96/12,705.59
6. Step 6: Final answer
   x = 6,578.54