Finding the Fourth Proportional to 9,931.75, 13,705.98 and 5,455.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,931.75 : 13,705.98 = 5,455.69 : x
2. Step 2: Convert to fraction form
   9,931.75/13,705.98 = 5,455.69/x
3. Step 3: Cross multiply
   9,931.75x = 13,705.98 × 5,455.69
4. Step 4: Simplify right side
   9,931.75x = 74,775,523.30
5. Step 5: Solve for x
   x = 74,775,523.30/9,931.75
6. Step 6: Final answer
   x = 7,528.94