Finding the Fourth Proportional to 31,078.18, 42,902.26 and 18,327.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,078.18 : 42,902.26 = 18,327.06 : x
2. Step 2: Convert to fraction form
   31,078.18/42,902.26 = 18,327.06/x
3. Step 3: Cross multiply
   31,078.18x = 42,902.26 × 18,327.06
4. Step 4: Simplify right side
   31,078.18x = 786,272,247.34
5. Step 5: Solve for x
   x = 786,272,247.34/31,078.18
6. Step 6: Final answer
   x = 25,299.82