Finding the Fourth Proportional to 2,090.78, 3,136.47 and 630.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.78 : 3,136.47 = 630.05 : x
2. Step 2: Convert to fraction form
   2,090.78/3,136.47 = 630.05/x
3. Step 3: Cross multiply
   2,090.78x = 3,136.47 × 630.05
4. Step 4: Simplify right side
   2,090.78x = 1,976,114.88
5. Step 5: Solve for x
   x = 1,976,114.88/2,090.78
6. Step 6: Final answer
   x = 945.16