Finding the Fourth Proportional to 30,888, 42,628.32 and 17,640

Step by Step Solution

1. Step 1: Write the proportion equation
   30,888 : 42,628.32 = 17,640 : x
2. Step 2: Convert to fraction form
   30,888/42,628.32 = 17,640/x
3. Step 3: Cross multiply
   30,888x = 42,628.32 × 17,640
4. Step 4: Simplify right side
   30,888x = 751,963,564.80
5. Step 5: Solve for x
   x = 751,963,564.80/30,888
6. Step 6: Final answer
   x = 24,344.84