Finding the Fourth Proportional to 42,745.08, 64,124.88 and 13,162.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,745.08 : 64,124.88 = 13,162.32 : x
2. Step 2: Convert to fraction form
   42,745.08/64,124.88 = 13,162.32/x
3. Step 3: Cross multiply
   42,745.08x = 64,124.88 × 13,162.32
4. Step 4: Simplify right side
   42,745.08x = 844,032,190.52
5. Step 5: Solve for x
   x = 844,032,190.52/42,745.08
6. Step 6: Final answer
   x = 19,745.72