Finding the Fourth Proportional to 2,420.01, 3,630.15 and 688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,420.01 : 3,630.15 = 688.50 : x
2. Step 2: Convert to fraction form
   2,420.01/3,630.15 = 688.50/x
3. Step 3: Cross multiply
   2,420.01x = 3,630.15 × 688.50
4. Step 4: Simplify right side
   2,420.01x = 2,499,358.28
5. Step 5: Solve for x
   x = 2,499,358.28/2,420.01
6. Step 6: Final answer
   x = 1,032.79