Finding the Fourth Proportional to 39,447.77, 59,174.72 and 13,152.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,447.77 : 59,174.72 = 13,152.50 : x
2. Step 2: Convert to fraction form
   39,447.77/59,174.72 = 13,152.50/x
3. Step 3: Cross multiply
   39,447.77x = 59,174.72 × 13,152.50
4. Step 4: Simplify right side
   39,447.77x = 778,295,143.16
5. Step 5: Solve for x
   x = 778,295,143.16/39,447.77
6. Step 6: Final answer
   x = 19,729.77