Finding the Fourth Proportional to 1,402.56, 1,935.54 and 781.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.56 : 1,935.54 = 781.56 : x
2. Step 2: Convert to fraction form
   1,402.56/1,935.54 = 781.56/x
3. Step 3: Cross multiply
   1,402.56x = 1,935.54 × 781.56
4. Step 4: Simplify right side
   1,402.56x = 1,512,740.64
5. Step 5: Solve for x
   x = 1,512,740.64/1,402.56
6. Step 6: Final answer
   x = 1,078.56