Finding the Fourth Proportional to 31,079.96, 42,890.48 and 18,333.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,079.96 : 42,890.48 = 18,333.28 : x
2. Step 2: Convert to fraction form
   31,079.96/42,890.48 = 18,333.28/x
3. Step 3: Cross multiply
   31,079.96x = 42,890.48 × 18,333.28
4. Step 4: Simplify right side
   31,079.96x = 786,323,179.17
5. Step 5: Solve for x
   x = 786,323,179.17/31,079.96
6. Step 6: Final answer
   x = 25,300.01