Finding the Fourth Proportional to 249,846.69, 374,796.29 and 81,380.15

Step by Step Solution

1. Step 1: Write the proportion equation
   249,846.69 : 374,796.29 = 81,380.15 : x
2. Step 2: Convert to fraction form
   249,846.69/374,796.29 = 81,380.15/x
3. Step 3: Cross multiply
   249,846.69x = 374,796.29 × 81,380.15
4. Step 4: Simplify right side
   249,846.69x = 30,500,976,018.76
5. Step 5: Solve for x
   x = 30,500,976,018.76/249,846.69
6. Step 6: Final answer
   x = 122,078.77