Finding the Fourth Proportional to 31,395.30, 43,323.54 and 28,887.54

Step by Step Solution

1. Step 1: Write the proportion equation
   31,395.30 : 43,323.54 = 28,887.54 : x
2. Step 2: Convert to fraction form
   31,395.30/43,323.54 = 28,887.54/x
3. Step 3: Cross multiply
   31,395.30x = 43,323.54 × 28,887.54
4. Step 4: Simplify right side
   31,395.30x = 1,251,510,494.69
5. Step 5: Solve for x
   x = 1,251,510,494.69/31,395.30
6. Step 6: Final answer
   x = 39,862.99