Finding the Fourth Proportional to 70,531.47, 105,796.72 and 17,940.49

Step by Step Solution

1. Step 1: Write the proportion equation
   70,531.47 : 105,796.72 = 17,940.49 : x
2. Step 2: Convert to fraction form
   70,531.47/105,796.72 = 17,940.49/x
3. Step 3: Cross multiply
   70,531.47x = 105,796.72 × 17,940.49
4. Step 4: Simplify right side
   70,531.47x = 1,898,044,997.19
5. Step 5: Solve for x
   x = 1,898,044,997.19/70,531.47
6. Step 6: Final answer
   x = 26,910.61