Finding the Fourth Proportional to 42,858.55, 64,298.09 and 17,884.71

Step by Step Solution

1. Step 1: Write the proportion equation
   42,858.55 : 64,298.09 = 17,884.71 : x
2. Step 2: Convert to fraction form
   42,858.55/64,298.09 = 17,884.71/x
3. Step 3: Cross multiply
   42,858.55x = 64,298.09 × 17,884.71
4. Step 4: Simplify right side
   42,858.55x = 1,149,952,371.71
5. Step 5: Solve for x
   x = 1,149,952,371.71/42,858.55
6. Step 6: Final answer
   x = 26,831.34