Finding the Fourth Proportional to 39,378, 59,076.72 and 11,676

Step by Step Solution

1. Step 1: Write the proportion equation
   39,378 : 59,076.72 = 11,676 : x
2. Step 2: Convert to fraction form
   39,378/59,076.72 = 11,676/x
3. Step 3: Cross multiply
   39,378x = 59,076.72 × 11,676
4. Step 4: Simplify right side
   39,378x = 689,779,782.72
5. Step 5: Solve for x
   x = 689,779,782.72/39,378
6. Step 6: Final answer
   x = 17,516.88