Finding the Fourth Proportional to 1,661.94, 2,493.12 and 785.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.94 : 2,493.12 = 785.34 : x
2. Step 2: Convert to fraction form
   1,661.94/2,493.12 = 785.34/x
3. Step 3: Cross multiply
   1,661.94x = 2,493.12 × 785.34
4. Step 4: Simplify right side
   1,661.94x = 1,957,946.86
5. Step 5: Solve for x
   x = 1,957,946.86/1,661.94
6. Step 6: Final answer
   x = 1,178.11