Finding the Fourth Proportional to 9,931.25, 13,705.37 and 5,455.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,931.25 : 13,705.37 = 5,455.42 : x
2. Step 2: Convert to fraction form
   9,931.25/13,705.37 = 5,455.42/x
3. Step 3: Cross multiply
   9,931.25x = 13,705.37 × 5,455.42
4. Step 4: Simplify right side
   9,931.25x = 74,768,453.80
5. Step 5: Solve for x
   x = 74,768,453.80/9,931.25
6. Step 6: Final answer
   x = 7,528.61