Finding the Fourth Proportional to 1,072.00, 1,479.35 and 630.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.00 : 1,479.35 = 630.15 : x
2. Step 2: Convert to fraction form
   1,072.00/1,479.35 = 630.15/x
3. Step 3: Cross multiply
   1,072.00x = 1,479.35 × 630.15
4. Step 4: Simplify right side
   1,072.00x = 932,212.40
5. Step 5: Solve for x
   x = 932,212.40/1,072.00
6. Step 6: Final answer
   x = 869.61