Finding the Fourth Proportional to 1,050.53, 1,449.61 and 630.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.53 : 1,449.61 = 630.86 : x
2. Step 2: Convert to fraction form
   1,050.53/1,449.61 = 630.86/x
3. Step 3: Cross multiply
   1,050.53x = 1,449.61 × 630.86
4. Step 4: Simplify right side
   1,050.53x = 914,492.14
5. Step 5: Solve for x
   x = 914,492.14/1,050.53
6. Step 6: Final answer
   x = 870.51