Finding the Fourth Proportional to 70,521.27, 105,782.31 and 17,930.81

Step by Step Solution

1. Step 1: Write the proportion equation
   70,521.27 : 105,782.31 = 17,930.81 : x
2. Step 2: Convert to fraction form
   70,521.27/105,782.31 = 17,930.81/x
3. Step 3: Cross multiply
   70,521.27x = 105,782.31 × 17,930.81
4. Step 4: Simplify right side
   70,521.27x = 1,896,761,973.06
5. Step 5: Solve for x
   x = 1,896,761,973.06/70,521.27
6. Step 6: Final answer
   x = 26,896.31