Finding the Fourth Proportional to 42,728.58, 64,100.97 and 17,755.07

Step by Step Solution

1. Step 1: Write the proportion equation
   42,728.58 : 64,100.97 = 17,755.07 : x
2. Step 2: Convert to fraction form
   42,728.58/64,100.97 = 17,755.07/x
3. Step 3: Cross multiply
   42,728.58x = 64,100.97 × 17,755.07
4. Step 4: Simplify right side
   42,728.58x = 1,138,116,888.91
5. Step 5: Solve for x
   x = 1,138,116,888.91/42,728.58
6. Step 6: Final answer
   x = 26,635.96