Finding the Fourth Proportional to 42,865.65, 64,308.60 and 17,891.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,865.65 : 64,308.60 = 17,891.82 : x
2. Step 2: Convert to fraction form
   42,865.65/64,308.60 = 17,891.82/x
3. Step 3: Cross multiply
   42,865.65x = 64,308.60 × 17,891.82
4. Step 4: Simplify right side
   42,865.65x = 1,150,597,895.65
5. Step 5: Solve for x
   x = 1,150,597,895.65/42,865.65
6. Step 6: Final answer
   x = 26,841.96