Finding the Fourth Proportional to 274,870.72, 412,043.64 and 87,760.72

Step by Step Solution

1. Step 1: Write the proportion equation
   274,870.72 : 412,043.64 = 87,760.72 : x
2. Step 2: Convert to fraction form
   274,870.72/412,043.64 = 87,760.72/x
3. Step 3: Cross multiply
   274,870.72x = 412,043.64 × 87,760.72
4. Step 4: Simplify right side
   274,870.72x = 36,161,246,517.82
5. Step 5: Solve for x
   x = 36,161,246,517.82/274,870.72
6. Step 6: Final answer
   x = 131,557.29