Finding the Fourth Proportional to 231,477.14, 347,243.49 and 81,686.50

Step by Step Solution

1. Step 1: Write the proportion equation
   231,477.14 : 347,243.49 = 81,686.50 : x
2. Step 2: Convert to fraction form
   231,477.14/347,243.49 = 81,686.50/x
3. Step 3: Cross multiply
   231,477.14x = 347,243.49 × 81,686.50
4. Step 4: Simplify right side
   231,477.14x = 28,365,105,345.89
5. Step 5: Solve for x
   x = 28,365,105,345.89/231,477.14
6. Step 6: Final answer
   x = 122,539.55