Finding the Fourth Proportional to 6,650.78, 9,976.14 and 1,720.01

Step by Step Solution

1. Step 1: Write the proportion equation
   6,650.78 : 9,976.14 = 1,720.01 : x
2. Step 2: Convert to fraction form
   6,650.78/9,976.14 = 1,720.01/x
3. Step 3: Cross multiply
   6,650.78x = 9,976.14 × 1,720.01
4. Step 4: Simplify right side
   6,650.78x = 17,159,085.50
5. Step 5: Solve for x
   x = 17,159,085.50/6,650.78
6. Step 6: Final answer
   x = 2,580.01