Finding the Fourth Proportional to 1,685.09, 2,325.59 and 976.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.09 : 2,325.59 = 976.91 : x
2. Step 2: Convert to fraction form
   1,685.09/2,325.59 = 976.91/x
3. Step 3: Cross multiply
   1,685.09x = 2,325.59 × 976.91
4. Step 4: Simplify right side
   1,685.09x = 2,271,875.61
5. Step 5: Solve for x
   x = 2,271,875.61/1,685.09
6. Step 6: Final answer
   x = 1,348.23