Finding the Fourth Proportional to 1,384.88, 2,076.71 and 540.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.88 : 2,076.71 = 540.45 : x
2. Step 2: Convert to fraction form
   1,384.88/2,076.71 = 540.45/x
3. Step 3: Cross multiply
   1,384.88x = 2,076.71 × 540.45
4. Step 4: Simplify right side
   1,384.88x = 1,122,362.15
5. Step 5: Solve for x
   x = 1,122,362.15/1,384.88
6. Step 6: Final answer
   x = 810.44