Finding the Fourth Proportional to 314,778.47, 434,085.69 and 199,857.61

Step by Step Solution

1. Step 1: Write the proportion equation
   314,778.47 : 434,085.69 = 199,857.61 : x
2. Step 2: Convert to fraction form
   314,778.47/434,085.69 = 199,857.61/x
3. Step 3: Cross multiply
   314,778.47x = 434,085.69 × 199,857.61
4. Step 4: Simplify right side
   314,778.47x = 86,755,327,453.39
5. Step 5: Solve for x
   x = 86,755,327,453.39/314,778.47
6. Step 6: Final answer
   x = 275,607.56