Finding the Fourth Proportional to 261,434.69, 392,111.01 and 71,909.27

Step by Step Solution

1. Step 1: Write the proportion equation
   261,434.69 : 392,111.01 = 71,909.27 : x
2. Step 2: Convert to fraction form
   261,434.69/392,111.01 = 71,909.27/x
3. Step 3: Cross multiply
   261,434.69x = 392,111.01 × 71,909.27
4. Step 4: Simplify right side
   261,434.69x = 28,196,414,527.51
5. Step 5: Solve for x
   x = 28,196,414,527.51/261,434.69
6. Step 6: Final answer
   x = 107,852.62