Finding the Fourth Proportional to 2,085.42, 3,127.86 and 624.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.42 : 3,127.86 = 624.45 : x
2. Step 2: Convert to fraction form
   2,085.42/3,127.86 = 624.45/x
3. Step 3: Cross multiply
   2,085.42x = 3,127.86 × 624.45
4. Step 4: Simplify right side
   2,085.42x = 1,953,192.18
5. Step 5: Solve for x
   x = 1,953,192.18/2,085.42
6. Step 6: Final answer
   x = 936.59