Finding the Fourth Proportional to 1,402.94, 2,104.42 and 752.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.94 : 2,104.42 = 752.78 : x
2. Step 2: Convert to fraction form
   1,402.94/2,104.42 = 752.78/x
3. Step 3: Cross multiply
   1,402.94x = 2,104.42 × 752.78
4. Step 4: Simplify right side
   1,402.94x = 1,584,165.29
5. Step 5: Solve for x
   x = 1,584,165.29/1,402.94
6. Step 6: Final answer
   x = 1,129.18