Finding the Fourth Proportional to 39,128.31, 58,706.91 and 18,078.44

Step by Step Solution

1. Step 1: Write the proportion equation
   39,128.31 : 58,706.91 = 18,078.44 : x
2. Step 2: Convert to fraction form
   39,128.31/58,706.91 = 18,078.44/x
3. Step 3: Cross multiply
   39,128.31x = 58,706.91 × 18,078.44
4. Step 4: Simplify right side
   39,128.31x = 1,061,329,056.49
5. Step 5: Solve for x
   x = 1,061,329,056.49/39,128.31
6. Step 6: Final answer
   x = 27,124.33