Finding the Fourth Proportional to 2,083.60, 3,124.50 and 622.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.60 : 3,124.50 = 622.72 : x
2. Step 2: Convert to fraction form
   2,083.60/3,124.50 = 622.72/x
3. Step 3: Cross multiply
   2,083.60x = 3,124.50 × 622.72
4. Step 4: Simplify right side
   2,083.60x = 1,945,688.64
5. Step 5: Solve for x
   x = 1,945,688.64/2,083.60
6. Step 6: Final answer
   x = 933.81