Finding the Fourth Proportional to 1,127.50, 1,555.89 and 630.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.50 : 1,555.89 = 630.16 : x
2. Step 2: Convert to fraction form
   1,127.50/1,555.89 = 630.16/x
3. Step 3: Cross multiply
   1,127.50x = 1,555.89 × 630.16
4. Step 4: Simplify right side
   1,127.50x = 980,459.64
5. Step 5: Solve for x
   x = 980,459.64/1,127.50
6. Step 6: Final answer
   x = 869.59