Finding the Fourth Proportional to 2,221.71, 3,330.77 and 924.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.71 : 3,330.77 = 924.15 : x
2. Step 2: Convert to fraction form
   2,221.71/3,330.77 = 924.15/x
3. Step 3: Cross multiply
   2,221.71x = 3,330.77 × 924.15
4. Step 4: Simplify right side
   2,221.71x = 3,078,126.47
5. Step 5: Solve for x
   x = 3,078,126.47/2,221.71
6. Step 6: Final answer
   x = 1,385.48