Finding the Fourth Proportional to 9,858.75, 14,764.54 and 5,686.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,858.75 : 14,764.54 = 5,686.10 : x
2. Step 2: Convert to fraction form
   9,858.75/14,764.54 = 5,686.10/x
3. Step 3: Cross multiply
   9,858.75x = 14,764.54 × 5,686.10
4. Step 4: Simplify right side
   9,858.75x = 83,952,727.58
5. Step 5: Solve for x
   x = 83,952,727.58/9,858.75
6. Step 6: Final answer
   x = 8,515.56