Finding the Fourth Proportional to 6,403.31, 9,608.61 and 5,112.98

Step by Step Solution

1. Step 1: Write the proportion equation
   6,403.31 : 9,608.61 = 5,112.98 : x
2. Step 2: Convert to fraction form
   6,403.31/9,608.61 = 5,112.98/x
3. Step 3: Cross multiply
   6,403.31x = 9,608.61 × 5,112.98
4. Step 4: Simplify right side
   6,403.31x = 49,128,630.76
5. Step 5: Solve for x
   x = 49,128,630.76/6,403.31
6. Step 6: Final answer
   x = 7,672.38