Finding the Fourth Proportional to 1,404.31, 2,104.76 and 622.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.31 : 2,104.76 = 622.63 : x
2. Step 2: Convert to fraction form
   1,404.31/2,104.76 = 622.63/x
3. Step 3: Cross multiply
   1,404.31x = 2,104.76 × 622.63
4. Step 4: Simplify right side
   1,404.31x = 1,310,486.72
5. Step 5: Solve for x
   x = 1,310,486.72/1,404.31
6. Step 6: Final answer
   x = 933.19