Finding the Fourth Proportional to 42,867.90, 64,311.98 and 17,894.07

Step by Step Solution

1. Step 1: Write the proportion equation
   42,867.90 : 64,311.98 = 17,894.07 : x
2. Step 2: Convert to fraction form
   42,867.90/64,311.98 = 17,894.07/x
3. Step 3: Cross multiply
   42,867.90x = 64,311.98 × 17,894.07
4. Step 4: Simplify right side
   42,867.90x = 1,150,802,982.49
5. Step 5: Solve for x
   x = 1,150,802,982.49/42,867.90
6. Step 6: Final answer
   x = 26,845.33