Finding the Fourth Proportional to 6,499.03, 9,746.10 and 5,128.51

Step by Step Solution

1. Step 1: Write the proportion equation
   6,499.03 : 9,746.10 = 5,128.51 : x
2. Step 2: Convert to fraction form
   6,499.03/9,746.10 = 5,128.51/x
3. Step 3: Cross multiply
   6,499.03x = 9,746.10 × 5,128.51
4. Step 4: Simplify right side
   6,499.03x = 49,982,946.95
5. Step 5: Solve for x
   x = 49,982,946.95/6,499.03
6. Step 6: Final answer
   x = 7,690.83