Finding the Fourth Proportional to 1,070.82, 1,477.95 and 628.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,070.82 : 1,477.95 = 628.86 : x
2. Step 2: Convert to fraction form
   1,070.82/1,477.95 = 628.86/x
3. Step 3: Cross multiply
   1,070.82x = 1,477.95 × 628.86
4. Step 4: Simplify right side
   1,070.82x = 929,426.82
5. Step 5: Solve for x
   x = 929,426.82/1,070.82
6. Step 6: Final answer
   x = 867.96