Finding the Fourth Proportional to 2,085.18, 3,127.79 and 624.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.18 : 3,127.79 = 624.34 : x
2. Step 2: Convert to fraction form
   2,085.18/3,127.79 = 624.34/x
3. Step 3: Cross multiply
   2,085.18x = 3,127.79 × 624.34
4. Step 4: Simplify right side
   2,085.18x = 1,952,804.41
5. Step 5: Solve for x
   x = 1,952,804.41/2,085.18
6. Step 6: Final answer
   x = 936.52