Finding the Fourth Proportional to 31,007.10, 42,774.76 and 18,422.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,007.10 : 42,774.76 = 18,422.94 : x
2. Step 2: Convert to fraction form
   31,007.10/42,774.76 = 18,422.94/x
3. Step 3: Cross multiply
   31,007.10x = 42,774.76 × 18,422.94
4. Step 4: Simplify right side
   31,007.10x = 788,036,836.99
5. Step 5: Solve for x
   x = 788,036,836.99/31,007.10
6. Step 6: Final answer
   x = 25,414.72