Finding the Fourth Proportional to 269,311.89, 403,978.05 and 100,814.49

Step by Step Solution

1. Step 1: Write the proportion equation
   269,311.89 : 403,978.05 = 100,814.49 : x
2. Step 2: Convert to fraction form
   269,311.89/403,978.05 = 100,814.49/x
3. Step 3: Cross multiply
   269,311.89x = 403,978.05 × 100,814.49
4. Step 4: Simplify right side
   269,311.89x = 40,726,841,081.94
5. Step 5: Solve for x
   x = 40,726,841,081.94/269,311.89
6. Step 6: Final answer
   x = 151,225.56