Finding the Fourth Proportional to 9,931.75, 13,706.03 and 5,455.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,931.75 : 13,706.03 = 5,455.51 : x
2. Step 2: Convert to fraction form
   9,931.75/13,706.03 = 5,455.51/x
3. Step 3: Cross multiply
   9,931.75x = 13,706.03 × 5,455.51
4. Step 4: Simplify right side
   9,931.75x = 74,773,363.10
5. Step 5: Solve for x
   x = 74,773,363.10/9,931.75
6. Step 6: Final answer
   x = 7,528.72