Finding the Fourth Proportional to 31,835.58, 43,919.49 and 19,878.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,835.58 : 43,919.49 = 19,878.15 : x
2. Step 2: Convert to fraction form
   31,835.58/43,919.49 = 19,878.15/x
3. Step 3: Cross multiply
   31,835.58x = 43,919.49 × 19,878.15
4. Step 4: Simplify right side
   31,835.58x = 873,038,449.38
5. Step 5: Solve for x
   x = 873,038,449.38/31,835.58
6. Step 6: Final answer
   x = 27,423.36