Finding the Fourth Proportional to 7,710.68, 10,629.42 and 5,557.88

Step by Step Solution

1. Step 1: Write the proportion equation
   7,710.68 : 10,629.42 = 5,557.88 : x
2. Step 2: Convert to fraction form
   7,710.68/10,629.42 = 5,557.88/x
3. Step 3: Cross multiply
   7,710.68x = 10,629.42 × 5,557.88
4. Step 4: Simplify right side
   7,710.68x = 59,077,040.83
5. Step 5: Solve for x
   x = 59,077,040.83/7,710.68
6. Step 6: Final answer
   x = 7,661.72