Finding the Fourth Proportional to 40,769.80, 61,137.42 and 13,061.32

Step by Step Solution

1. Step 1: Write the proportion equation
   40,769.80 : 61,137.42 = 13,061.32 : x
2. Step 2: Convert to fraction form
   40,769.80/61,137.42 = 13,061.32/x
3. Step 3: Cross multiply
   40,769.80x = 61,137.42 × 13,061.32
4. Step 4: Simplify right side
   40,769.80x = 798,535,406.59
5. Step 5: Solve for x
   x = 798,535,406.59/40,769.80
6. Step 6: Final answer
   x = 19,586.44