Finding the Fourth Proportional to 1,063.68, 1,467.72 and 621.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,063.68 : 1,467.72 = 621.48 : x
2. Step 2: Convert to fraction form
   1,063.68/1,467.72 = 621.48/x
3. Step 3: Cross multiply
   1,063.68x = 1,467.72 × 621.48
4. Step 4: Simplify right side
   1,063.68x = 912,158.63
5. Step 5: Solve for x
   x = 912,158.63/1,063.68
6. Step 6: Final answer
   x = 857.55