Finding the Fourth Proportional to 2,085.05, 3,126.67 and 623.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.05 : 3,126.67 = 623.86 : x
2. Step 2: Convert to fraction form
   2,085.05/3,126.67 = 623.86/x
3. Step 3: Cross multiply
   2,085.05x = 3,126.67 × 623.86
4. Step 4: Simplify right side
   2,085.05x = 1,950,618.27
5. Step 5: Solve for x
   x = 1,950,618.27/2,085.05
6. Step 6: Final answer
   x = 935.52