Finding the Fourth Proportional to 2,102.00, 3,152.52 and 640.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,102.00 : 3,152.52 = 640.76 : x
2. Step 2: Convert to fraction form
   2,102.00/3,152.52 = 640.76/x
3. Step 3: Cross multiply
   2,102.00x = 3,152.52 × 640.76
4. Step 4: Simplify right side
   2,102.00x = 2,019,992.95
5. Step 5: Solve for x
   x = 2,019,992.95/2,102.00
6. Step 6: Final answer
   x = 960.99