Finding the Fourth Proportional to 1,063.71, 1,467.50 and 621.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,063.71 : 1,467.50 = 621.45 : x
2. Step 2: Convert to fraction form
   1,063.71/1,467.50 = 621.45/x
3. Step 3: Cross multiply
   1,063.71x = 1,467.50 × 621.45
4. Step 4: Simplify right side
   1,063.71x = 911,974.77
5. Step 5: Solve for x
   x = 911,974.77/1,063.71
6. Step 6: Final answer
   x = 857.35