Finding the Fourth Proportional to 40,385.84, 60,584.52 and 12,686

Step by Step Solution

1. Step 1: Write the proportion equation
   40,385.84 : 60,584.52 = 12,686 : x
2. Step 2: Convert to fraction form
   40,385.84/60,584.52 = 12,686/x
3. Step 3: Cross multiply
   40,385.84x = 60,584.52 × 12,686
4. Step 4: Simplify right side
   40,385.84x = 768,575,220.72
5. Step 5: Solve for x
   x = 768,575,220.72/40,385.84
6. Step 6: Final answer
   x = 19,030.81