Finding the Fourth Proportional to 31,878.78, 43,900.83 and 31,781.58

Step by Step Solution

1. Step 1: Write the proportion equation
   31,878.78 : 43,900.83 = 31,781.58 : x
2. Step 2: Convert to fraction form
   31,878.78/43,900.83 = 31,781.58/x
3. Step 3: Cross multiply
   31,878.78x = 43,900.83 × 31,781.58
4. Step 4: Simplify right side
   31,878.78x = 1,395,237,740.71
5. Step 5: Solve for x
   x = 1,395,237,740.71/31,878.78
6. Step 6: Final answer
   x = 43,766.97