Finding the Fourth Proportional to 37,591.69, 56,231.69 and 28,639.28

Step by Step Solution

1. Step 1: Write the proportion equation
   37,591.69 : 56,231.69 = 28,639.28 : x
2. Step 2: Convert to fraction form
   37,591.69/56,231.69 = 28,639.28/x
3. Step 3: Cross multiply
   37,591.69x = 56,231.69 × 28,639.28
4. Step 4: Simplify right side
   37,591.69x = 1,610,434,833.62
5. Step 5: Solve for x
   x = 1,610,434,833.62/37,591.69
6. Step 6: Final answer
   x = 42,840.19