Finding the Fourth Proportional to 42,699.57, 64,005.60 and 17,754.09

Step by Step Solution

1. Step 1: Write the proportion equation
   42,699.57 : 64,005.60 = 17,754.09 : x
2. Step 2: Convert to fraction form
   42,699.57/64,005.60 = 17,754.09/x
3. Step 3: Cross multiply
   42,699.57x = 64,005.60 × 17,754.09
4. Step 4: Simplify right side
   42,699.57x = 1,136,361,182.90
5. Step 5: Solve for x
   x = 1,136,361,182.90/42,699.57
6. Step 6: Final answer
   x = 26,612.94