Finding the Fourth Proportional to 2,012.47, 3,018.72 and 625.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.47 : 3,018.72 = 625.78 : x
2. Step 2: Convert to fraction form
   2,012.47/3,018.72 = 625.78/x
3. Step 3: Cross multiply
   2,012.47x = 3,018.72 × 625.78
4. Step 4: Simplify right side
   2,012.47x = 1,889,054.60
5. Step 5: Solve for x
   x = 1,889,054.60/2,012.47
6. Step 6: Final answer
   x = 938.67