Finding the Fourth Proportional to 2,953.82, 4,429.65 and 1,221.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,953.82 : 4,429.65 = 1,221.50 : x
2. Step 2: Convert to fraction form
   2,953.82/4,429.65 = 1,221.50/x
3. Step 3: Cross multiply
   2,953.82x = 4,429.65 × 1,221.50
4. Step 4: Simplify right side
   2,953.82x = 5,410,817.48
5. Step 5: Solve for x
   x = 5,410,817.48/2,953.82
6. Step 6: Final answer
   x = 1,831.80