Finding the Fourth Proportional to 1,583.84, 2,185.68 and 994.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,583.84 : 2,185.68 = 994.72 : x
2. Step 2: Convert to fraction form
   1,583.84/2,185.68 = 994.72/x
3. Step 3: Cross multiply
   1,583.84x = 2,185.68 × 994.72
4. Step 4: Simplify right side
   1,583.84x = 2,174,139.61
5. Step 5: Solve for x
   x = 2,174,139.61/1,583.84
6. Step 6: Final answer
   x = 1,372.70