Finding the Fourth Proportional to 42,858.05, 64,297.34 and 17,884.21

Step by Step Solution

1. Step 1: Write the proportion equation
   42,858.05 : 64,297.34 = 17,884.21 : x
2. Step 2: Convert to fraction form
   42,858.05/64,297.34 = 17,884.21/x
3. Step 3: Cross multiply
   42,858.05x = 64,297.34 × 17,884.21
4. Step 4: Simplify right side
   42,858.05x = 1,149,906,904.39
5. Step 5: Solve for x
   x = 1,149,906,904.39/42,858.05
6. Step 6: Final answer
   x = 26,830.59