Finding the Fourth Proportional to 42,858.63, 64,298.22 and 17,884.79

Step by Step Solution

1. Step 1: Write the proportion equation
   42,858.63 : 64,298.22 = 17,884.79 : x
2. Step 2: Convert to fraction form
   42,858.63/64,298.22 = 17,884.79/x
3. Step 3: Cross multiply
   42,858.63x = 64,298.22 × 17,884.79
4. Step 4: Simplify right side
   42,858.63x = 1,149,960,072.65
5. Step 5: Solve for x
   x = 1,149,960,072.65/42,858.63
6. Step 6: Final answer
   x = 26,831.47