Finding the Fourth Proportional to 31,875, 43,990.06 and 18,629.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,875 : 43,990.06 = 18,629.56 : x
2. Step 2: Convert to fraction form
   31,875/43,990.06 = 18,629.56/x
3. Step 3: Cross multiply
   31,875x = 43,990.06 × 18,629.56
4. Step 4: Simplify right side
   31,875x = 819,515,462.17
5. Step 5: Solve for x
   x = 819,515,462.17/31,875
6. Step 6: Final answer
   x = 25,710.29