Finding the Fourth Proportional to 1,050.77, 1,449.83 and 631.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.77 : 1,449.83 = 631.01 : x
2. Step 2: Convert to fraction form
   1,050.77/1,449.83 = 631.01/x
3. Step 3: Cross multiply
   1,050.77x = 1,449.83 × 631.01
4. Step 4: Simplify right side
   1,050.77x = 914,854.07
5. Step 5: Solve for x
   x = 914,854.07/1,050.77
6. Step 6: Final answer
   x = 870.65