Finding the Fourth Proportional to 1,127.39, 1,555.72 and 630.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.39 : 1,555.72 = 630.01 : x
2. Step 2: Convert to fraction form
   1,127.39/1,555.72 = 630.01/x
3. Step 3: Cross multiply
   1,127.39x = 1,555.72 × 630.01
4. Step 4: Simplify right side
   1,127.39x = 980,119.16
5. Step 5: Solve for x
   x = 980,119.16/1,127.39
6. Step 6: Final answer
   x = 869.37