Finding the Fourth Proportional to 1,334.60, 1,842.78 and 1,039.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,334.60 : 1,842.78 = 1,039.36 : x
2. Step 2: Convert to fraction form
   1,334.60/1,842.78 = 1,039.36/x
3. Step 3: Cross multiply
   1,334.60x = 1,842.78 × 1,039.36
4. Step 4: Simplify right side
   1,334.60x = 1,915,300.61
5. Step 5: Solve for x
   x = 1,915,300.61/1,334.60
6. Step 6: Final answer
   x = 1,435.11