Finding the Fourth Proportional to 30,942.02, 42,690.18 and 18,191.12

Step by Step Solution

1. Step 1: Write the proportion equation
   30,942.02 : 42,690.18 = 18,191.12 : x
2. Step 2: Convert to fraction form
   30,942.02/42,690.18 = 18,191.12/x
3. Step 3: Cross multiply
   30,942.02x = 42,690.18 × 18,191.12
4. Step 4: Simplify right side
   30,942.02x = 776,582,187.20
5. Step 5: Solve for x
   x = 776,582,187.20/30,942.02
6. Step 6: Final answer
   x = 25,097.98