Finding the Fourth Proportional to 105,665.64, 158,499.08 and 26,780.10

Step by Step Solution

1. Step 1: Write the proportion equation
   105,665.64 : 158,499.08 = 26,780.10 : x
2. Step 2: Convert to fraction form
   105,665.64/158,499.08 = 26,780.10/x
3. Step 3: Cross multiply
   105,665.64x = 158,499.08 × 26,780.10
4. Step 4: Simplify right side
   105,665.64x = 4,244,621,212.31
5. Step 5: Solve for x
   x = 4,244,621,212.31/105,665.64
6. Step 6: Final answer
   x = 40,170.31