Finding the Fourth Proportional to 2,084.57, 3,126.78 and 623.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,084.57 : 3,126.78 = 623.69 : x
2. Step 2: Convert to fraction form
   2,084.57/3,126.78 = 623.69/x
3. Step 3: Cross multiply
   2,084.57x = 3,126.78 × 623.69
4. Step 4: Simplify right side
   2,084.57x = 1,950,141.42
5. Step 5: Solve for x
   x = 1,950,141.42/2,084.57
6. Step 6: Final answer
   x = 935.51