Finding the Fourth Proportional to 1,127.59, 1,556.01 and 630.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.59 : 1,556.01 = 630.25 : x
2. Step 2: Convert to fraction form
   1,127.59/1,556.01 = 630.25/x
3. Step 3: Cross multiply
   1,127.59x = 1,556.01 × 630.25
4. Step 4: Simplify right side
   1,127.59x = 980,671.41
5. Step 5: Solve for x
   x = 980,671.41/1,127.59
6. Step 6: Final answer
   x = 869.71