Finding the Fourth Proportional to 31,196.80, 43,039.32 and 19,239.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,196.80 : 43,039.32 = 19,239.40 : x
2. Step 2: Convert to fraction form
   31,196.80/43,039.32 = 19,239.40/x
3. Step 3: Cross multiply
   31,196.80x = 43,039.32 × 19,239.40
4. Step 4: Simplify right side
   31,196.80x = 828,050,693.21
5. Step 5: Solve for x
   x = 828,050,693.21/31,196.80
6. Step 6: Final answer
   x = 26,542.81