Finding the Fourth Proportional to 1,633.42, 2,446.71 and 1,221.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,633.42 : 2,446.71 = 1,221.99 : x
2. Step 2: Convert to fraction form
   1,633.42/2,446.71 = 1,221.99/x
3. Step 3: Cross multiply
   1,633.42x = 2,446.71 × 1,221.99
4. Step 4: Simplify right side
   1,633.42x = 2,989,841.40
5. Step 5: Solve for x
   x = 2,989,841.40/1,633.42
6. Step 6: Final answer
   x = 1,830.42