Finding the Fourth Proportional to 39,667.42, 59,503.05 and 13,011.07

Step by Step Solution

1. Step 1: Write the proportion equation
   39,667.42 : 59,503.05 = 13,011.07 : x
2. Step 2: Convert to fraction form
   39,667.42/59,503.05 = 13,011.07/x
3. Step 3: Cross multiply
   39,667.42x = 59,503.05 × 13,011.07
4. Step 4: Simplify right side
   39,667.42x = 774,198,348.76
5. Step 5: Solve for x
   x = 774,198,348.76/39,667.42
6. Step 6: Final answer
   x = 19,517.23