Finding the Fourth Proportional to 1,380.83, 1,905.56 and 751.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.83 : 1,905.56 = 751.35 : x
2. Step 2: Convert to fraction form
   1,380.83/1,905.56 = 751.35/x
3. Step 3: Cross multiply
   1,380.83x = 1,905.56 × 751.35
4. Step 4: Simplify right side
   1,380.83x = 1,431,742.51
5. Step 5: Solve for x
   x = 1,431,742.51/1,380.83
6. Step 6: Final answer
   x = 1,036.87