Finding the Fourth Proportional to 105,774.58, 158,418.87 and 88,920.10

Step by Step Solution

1. Step 1: Write the proportion equation
   105,774.58 : 158,418.87 = 88,920.10 : x
2. Step 2: Convert to fraction form
   105,774.58/158,418.87 = 88,920.10/x
3. Step 3: Cross multiply
   105,774.58x = 158,418.87 × 88,920.10
4. Step 4: Simplify right side
   105,774.58x = 14,086,621,762.29
5. Step 5: Solve for x
   x = 14,086,621,762.29/105,774.58
6. Step 6: Final answer
   x = 133,175.87