Finding the Fourth Proportional to 31,087.96, 42,901.38 and 18,341.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,087.96 : 42,901.38 = 18,341.32 : x
2. Step 2: Convert to fraction form
   31,087.96/42,901.38 = 18,341.32/x
3. Step 3: Cross multiply
   31,087.96x = 42,901.38 × 18,341.32
4. Step 4: Simplify right side
   31,087.96x = 786,867,939.02
5. Step 5: Solve for x
   x = 786,867,939.02/31,087.96
6. Step 6: Final answer
   x = 25,311.02