Finding the Fourth Proportional to 39,328.56, 58,972.78 and 13,023.82

Step by Step Solution

1. Step 1: Write the proportion equation
   39,328.56 : 58,972.78 = 13,023.82 : x
2. Step 2: Convert to fraction form
   39,328.56/58,972.78 = 13,023.82/x
3. Step 3: Cross multiply
   39,328.56x = 58,972.78 × 13,023.82
4. Step 4: Simplify right side
   39,328.56x = 768,050,871.62
5. Step 5: Solve for x
   x = 768,050,871.62/39,328.56
6. Step 6: Final answer
   x = 19,529.09