Finding the Fourth Proportional to 42,946.47, 64,418.92 and 17,640.61

Step by Step Solution

1. Step 1: Write the proportion equation
   42,946.47 : 64,418.92 = 17,640.61 : x
2. Step 2: Convert to fraction form
   42,946.47/64,418.92 = 17,640.61/x
3. Step 3: Cross multiply
   42,946.47x = 64,418.92 × 17,640.61
4. Step 4: Simplify right side
   42,946.47x = 1,136,388,839.19
5. Step 5: Solve for x
   x = 1,136,388,839.19/42,946.47
6. Step 6: Final answer
   x = 26,460.59