Finding the Fourth Proportional to 31,086.11, 42,896.27 and 18,339.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,086.11 : 42,896.27 = 18,339.84 : x
2. Step 2: Convert to fraction form
   31,086.11/42,896.27 = 18,339.84/x
3. Step 3: Cross multiply
   31,086.11x = 42,896.27 × 18,339.84
4. Step 4: Simplify right side
   31,086.11x = 786,710,774.25
5. Step 5: Solve for x
   x = 786,710,774.25/31,086.11
6. Step 6: Final answer
   x = 25,307.47