Finding the Fourth Proportional to 42,732.32, 64,121.40 and 17,789.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,732.32 : 64,121.40 = 17,789.56 : x
2. Step 2: Convert to fraction form
   42,732.32/64,121.40 = 17,789.56/x
3. Step 3: Cross multiply
   42,732.32x = 64,121.40 × 17,789.56
4. Step 4: Simplify right side
   42,732.32x = 1,140,691,492.58
5. Step 5: Solve for x
   x = 1,140,691,492.58/42,732.32
6. Step 6: Final answer
   x = 26,693.88