Finding the Fourth Proportional to 1,827.50, 2,521.96 and 999.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,827.50 : 2,521.96 = 999.50 : x
2. Step 2: Convert to fraction form
   1,827.50/2,521.96 = 999.50/x
3. Step 3: Cross multiply
   1,827.50x = 2,521.96 × 999.50
4. Step 4: Simplify right side
   1,827.50x = 2,520,699.02
5. Step 5: Solve for x
   x = 2,520,699.02/1,827.50
6. Step 6: Final answer
   x = 1,379.32