Finding the Fourth Proportional to 30,807.73, 42,519.90 and 17,382.79

Step by Step Solution

1. Step 1: Write the proportion equation
   30,807.73 : 42,519.90 = 17,382.79 : x
2. Step 2: Convert to fraction form
   30,807.73/42,519.90 = 17,382.79/x
3. Step 3: Cross multiply
   30,807.73x = 42,519.90 × 17,382.79
4. Step 4: Simplify right side
   30,807.73x = 739,114,492.52
5. Step 5: Solve for x
   x = 739,114,492.52/30,807.73
6. Step 6: Final answer
   x = 23,991.20