Finding the Fourth Proportional to 31,240.69, 43,131.89 and 19,310.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,240.69 : 43,131.89 = 19,310.81 : x
2. Step 2: Convert to fraction form
   31,240.69/43,131.89 = 19,310.81/x
3. Step 3: Cross multiply
   31,240.69x = 43,131.89 × 19,310.81
4. Step 4: Simplify right side
   31,240.69x = 832,911,565.35
5. Step 5: Solve for x
   x = 832,911,565.35/31,240.69
6. Step 6: Final answer
   x = 26,661.12