Finding the Fourth Proportional to 9,931.12, 13,704.88 and 5,454.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,931.12 : 13,704.88 = 5,454.92 : x
2. Step 2: Convert to fraction form
   9,931.12/13,704.88 = 5,454.92/x
3. Step 3: Cross multiply
   9,931.12x = 13,704.88 × 5,454.92
4. Step 4: Simplify right side
   9,931.12x = 74,759,024.01
5. Step 5: Solve for x
   x = 74,759,024.01/9,931.12
6. Step 6: Final answer
   x = 7,527.75