Finding the Fourth Proportional to 39,404.21, 59,106.38 and 13,109.18

Step by Step Solution

1. Step 1: Write the proportion equation
   39,404.21 : 59,106.38 = 13,109.18 : x
2. Step 2: Convert to fraction form
   39,404.21/59,106.38 = 13,109.18/x
3. Step 3: Cross multiply
   39,404.21x = 59,106.38 × 13,109.18
4. Step 4: Simplify right side
   39,404.21x = 774,835,813.49
5. Step 5: Solve for x
   x = 774,835,813.49/39,404.21
6. Step 6: Final answer
   x = 19,663.78