Finding the Fourth Proportional to 42,786.80, 64,007.40 and 37,007.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,786.80 : 64,007.40 = 37,007.60 : x
2. Step 2: Convert to fraction form
   42,786.80/64,007.40 = 37,007.60/x
3. Step 3: Cross multiply
   42,786.80x = 64,007.40 × 37,007.60
4. Step 4: Simplify right side
   42,786.80x = 2,368,760,256.24
5. Step 5: Solve for x
   x = 2,368,760,256.24/42,786.80
6. Step 6: Final answer
   x = 55,361.94