Finding the Fourth Proportional to 1,392.76, 1,909.79 and 1,346.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.76 : 1,909.79 = 1,346.18 : x
2. Step 2: Convert to fraction form
   1,392.76/1,909.79 = 1,346.18/x
3. Step 3: Cross multiply
   1,392.76x = 1,909.79 × 1,346.18
4. Step 4: Simplify right side
   1,392.76x = 2,570,921.10
5. Step 5: Solve for x
   x = 2,570,921.10/1,392.76
6. Step 6: Final answer
   x = 1,845.92