Finding the Fourth Proportional to 2,153.86, 3,232.00 and 999.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,153.86 : 3,232.00 = 999.61 : x
2. Step 2: Convert to fraction form
   2,153.86/3,232.00 = 999.61/x
3. Step 3: Cross multiply
   2,153.86x = 3,232.00 × 999.61
4. Step 4: Simplify right side
   2,153.86x = 3,230,732.69
5. Step 5: Solve for x
   x = 3,230,732.69/2,153.86
6. Step 6: Final answer
   x = 1,499.98