Finding the Fourth Proportional to 1,685.84, 2,326.29 and 987.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.84 : 2,326.29 = 987.62 : x
2. Step 2: Convert to fraction form
   1,685.84/2,326.29 = 987.62/x
3. Step 3: Cross multiply
   1,685.84x = 2,326.29 × 987.62
4. Step 4: Simplify right side
   1,685.84x = 2,297,490.53
5. Step 5: Solve for x
   x = 2,297,490.53/1,685.84
6. Step 6: Final answer
   x = 1,362.82