Finding the Fourth Proportional to 1,384.47, 1,908.09 and 1,010.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.47 : 1,908.09 = 1,010.88 : x
2. Step 2: Convert to fraction form
   1,384.47/1,908.09 = 1,010.88/x
3. Step 3: Cross multiply
   1,384.47x = 1,908.09 × 1,010.88
4. Step 4: Simplify right side
   1,384.47x = 1,928,850.02
5. Step 5: Solve for x
   x = 1,928,850.02/1,384.47
6. Step 6: Final answer
   x = 1,393.20