Finding the Fourth Proportional to 1,380.51, 2,071.05 and 731.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.51 : 2,071.05 = 731.07 : x
2. Step 2: Convert to fraction form
   1,380.51/2,071.05 = 731.07/x
3. Step 3: Cross multiply
   1,380.51x = 2,071.05 × 731.07
4. Step 4: Simplify right side
   1,380.51x = 1,514,082.52
5. Step 5: Solve for x
   x = 1,514,082.52/1,380.51
6. Step 6: Final answer
   x = 1,096.76