Finding the Fourth Proportional to 1,384.04, 1,908.24 and 1,010.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.04 : 1,908.24 = 1,010.72 : x
2. Step 2: Convert to fraction form
   1,384.04/1,908.24 = 1,010.72/x
3. Step 3: Cross multiply
   1,384.04x = 1,908.24 × 1,010.72
4. Step 4: Simplify right side
   1,384.04x = 1,928,696.33
5. Step 5: Solve for x
   x = 1,928,696.33/1,384.04
6. Step 6: Final answer
   x = 1,393.53