Finding the Fourth Proportional to 1,320.52, 1,978.86 and 740.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.52 : 1,978.86 = 740.44 : x
2. Step 2: Convert to fraction form
   1,320.52/1,978.86 = 740.44/x
3. Step 3: Cross multiply
   1,320.52x = 1,978.86 × 740.44
4. Step 4: Simplify right side
   1,320.52x = 1,465,227.10
5. Step 5: Solve for x
   x = 1,465,227.10/1,320.52
6. Step 6: Final answer
   x = 1,109.58