Finding the Fourth Proportional to 105,834.21, 158,538.06 and 70,315.53

Step by Step Solution

1. Step 1: Write the proportion equation
   105,834.21 : 158,538.06 = 70,315.53 : x
2. Step 2: Convert to fraction form
   105,834.21/158,538.06 = 70,315.53/x
3. Step 3: Cross multiply
   105,834.21x = 158,538.06 × 70,315.53
4. Step 4: Simplify right side
   105,834.21x = 11,147,687,714.07
5. Step 5: Solve for x
   x = 11,147,687,714.07/105,834.21
6. Step 6: Final answer
   x = 105,331.61