Finding the Fourth Proportional to 1,662.50, 2,295.15 and 999.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.50 : 2,295.15 = 999.50 : x
2. Step 2: Convert to fraction form
   1,662.50/2,295.15 = 999.50/x
3. Step 3: Cross multiply
   1,662.50x = 2,295.15 × 999.50
4. Step 4: Simplify right side
   1,662.50x = 2,294,002.43
5. Step 5: Solve for x
   x = 2,294,002.43/1,662.50
6. Step 6: Final answer
   x = 1,379.85