Finding the Fourth Proportional to 1,685.58, 2,325.86 and 987.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.58 : 2,325.86 = 987.18 : x
2. Step 2: Convert to fraction form
   1,685.58/2,325.86 = 987.18/x
3. Step 3: Cross multiply
   1,685.58x = 2,325.86 × 987.18
4. Step 4: Simplify right side
   1,685.58x = 2,296,042.47
5. Step 5: Solve for x
   x = 2,296,042.47/1,685.58
6. Step 6: Final answer
   x = 1,362.17