Finding the Fourth Proportional to 42,937.76, 64,406.82 and 17,960.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,937.76 : 64,406.82 = 17,960.30 : x
2. Step 2: Convert to fraction form
   42,937.76/64,406.82 = 17,960.30/x
3. Step 3: Cross multiply
   42,937.76x = 64,406.82 × 17,960.30
4. Step 4: Simplify right side
   42,937.76x = 1,156,765,809.25
5. Step 5: Solve for x
   x = 1,156,765,809.25/42,937.76
6. Step 6: Final answer
   x = 26,940.53