Finding the Fourth Proportional to 113,618, 156,628.88 and 79,520.96

Step by Step Solution

1. Step 1: Write the proportion equation
   113,618 : 156,628.88 = 79,520.96 : x
2. Step 2: Convert to fraction form
   113,618/156,628.88 = 79,520.96/x
3. Step 3: Cross multiply
   113,618x = 156,628.88 × 79,520.96
4. Step 4: Simplify right side
   113,618x = 12,455,278,901.32
5. Step 5: Solve for x
   x = 12,455,278,901.32/113,618
6. Step 6: Final answer
   x = 109,624.17