Finding the Fourth Proportional to 276,792.48, 415,086.66 and 99,256.68

Step by Step Solution

1. Step 1: Write the proportion equation
   276,792.48 : 415,086.66 = 99,256.68 : x
2. Step 2: Convert to fraction form
   276,792.48/415,086.66 = 99,256.68/x
3. Step 3: Cross multiply
   276,792.48x = 415,086.66 × 99,256.68
4. Step 4: Simplify right side
   276,792.48x = 41,200,123,783.89
5. Step 5: Solve for x
   x = 41,200,123,783.89/276,792.48
6. Step 6: Final answer
   x = 148,848.42