Finding the Fourth Proportional to 39,667.52, 59,501.68 and 13,013.12

Step by Step Solution

1. Step 1: Write the proportion equation
   39,667.52 : 59,501.68 = 13,013.12 : x
2. Step 2: Convert to fraction form
   39,667.52/59,501.68 = 13,013.12/x
3. Step 3: Cross multiply
   39,667.52x = 59,501.68 × 13,013.12
4. Step 4: Simplify right side
   39,667.52x = 774,302,502.04
5. Step 5: Solve for x
   x = 774,302,502.04/39,667.52
6. Step 6: Final answer
   x = 19,519.81