Finding the Fourth Proportional to 72,215.51, 107,843.42 and 71,433.59

Step by Step Solution

1. Step 1: Write the proportion equation
   72,215.51 : 107,843.42 = 71,433.59 : x
2. Step 2: Convert to fraction form
   72,215.51/107,843.42 = 71,433.59/x
3. Step 3: Cross multiply
   72,215.51x = 107,843.42 × 71,433.59
4. Step 4: Simplify right side
   72,215.51x = 7,703,642,287.84
5. Step 5: Solve for x
   x = 7,703,642,287.84/72,215.51
6. Step 6: Final answer
   x = 106,675.74