Finding the Fourth Proportional to 1,019.56, 1,407.10 and 626.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.56 : 1,407.10 = 626.51 : x
2. Step 2: Convert to fraction form
   1,019.56/1,407.10 = 626.51/x
3. Step 3: Cross multiply
   1,019.56x = 1,407.10 × 626.51
4. Step 4: Simplify right side
   1,019.56x = 881,562.22
5. Step 5: Solve for x
   x = 881,562.22/1,019.56
6. Step 6: Final answer
   x = 864.65