Finding the Fourth Proportional to 2,127.08, 3,190.52 and 646.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,127.08 : 3,190.52 = 646.25 : x
2. Step 2: Convert to fraction form
   2,127.08/3,190.52 = 646.25/x
3. Step 3: Cross multiply
   2,127.08x = 3,190.52 × 646.25
4. Step 4: Simplify right side
   2,127.08x = 2,061,859.21
5. Step 5: Solve for x
   x = 2,061,859.21/2,127.08
6. Step 6: Final answer
   x = 969.34