Finding the Fourth Proportional to 185,826.72, 256,422.06 and 105,238.20

Step by Step Solution

1. Step 1: Write the proportion equation
   185,826.72 : 256,422.06 = 105,238.20 : x
2. Step 2: Convert to fraction form
   185,826.72/256,422.06 = 105,238.20/x
3. Step 3: Cross multiply
   185,826.72x = 256,422.06 × 105,238.20
4. Step 4: Simplify right side
   185,826.72x = 26,985,396,034.69
5. Step 5: Solve for x
   x = 26,985,396,034.69/185,826.72
6. Step 6: Final answer
   x = 145,218.06