Finding the Fourth Proportional to 42,868.40, 64,312.73 and 17,894.57

Step by Step Solution

1. Step 1: Write the proportion equation
   42,868.40 : 64,312.73 = 17,894.57 : x
2. Step 2: Convert to fraction form
   42,868.40/64,312.73 = 17,894.57/x
3. Step 3: Cross multiply
   42,868.40x = 64,312.73 × 17,894.57
4. Step 4: Simplify right side
   42,868.40x = 1,150,848,648.88
5. Step 5: Solve for x
   x = 1,150,848,648.88/42,868.40
6. Step 6: Final answer
   x = 26,846.08