Finding the Fourth Proportional to 31,111, 42,933.92 and 17,680.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,111 : 42,933.92 = 17,680.12 : x
2. Step 2: Convert to fraction form
   31,111/42,933.92 = 17,680.12/x
3. Step 3: Cross multiply
   31,111x = 42,933.92 × 17,680.12
4. Step 4: Simplify right side
   31,111x = 759,076,857.67
5. Step 5: Solve for x
   x = 759,076,857.67/31,111
6. Step 6: Final answer
   x = 24,398.99