Finding the Fourth Proportional to 31,007.32, 42,798.78 and 19,072.60

Step by Step Solution

1. Step 1: Write the proportion equation
   31,007.32 : 42,798.78 = 19,072.60 : x
2. Step 2: Convert to fraction form
   31,007.32/42,798.78 = 19,072.60/x
3. Step 3: Cross multiply
   31,007.32x = 42,798.78 × 19,072.60
4. Step 4: Simplify right side
   31,007.32x = 816,284,011.43
5. Step 5: Solve for x
   x = 816,284,011.43/31,007.32
6. Step 6: Final answer
   x = 26,325.53