Finding the Fourth Proportional to 105,116.34, 145,015.05 and 64,282.26

Step by Step Solution

1. Step 1: Write the proportion equation
   105,116.34 : 145,015.05 = 64,282.26 : x
2. Step 2: Convert to fraction form
   105,116.34/145,015.05 = 64,282.26/x
3. Step 3: Cross multiply
   105,116.34x = 145,015.05 × 64,282.26
4. Step 4: Simplify right side
   105,116.34x = 9,321,895,148.01
5. Step 5: Solve for x
   x = 9,321,895,148.01/105,116.34
6. Step 6: Final answer
   x = 88,681.69