Finding the Fourth Proportional to 249,380.54, 374,123.42 and 80,887.78

Step by Step Solution

1. Step 1: Write the proportion equation
   249,380.54 : 374,123.42 = 80,887.78 : x
2. Step 2: Convert to fraction form
   249,380.54/374,123.42 = 80,887.78/x
3. Step 3: Cross multiply
   249,380.54x = 374,123.42 × 80,887.78
4. Step 4: Simplify right side
   249,380.54x = 30,262,012,889.81
5. Step 5: Solve for x
   x = 30,262,012,889.81/249,380.54
6. Step 6: Final answer
   x = 121,348.73