Finding the Fourth Proportional to 9,931.38, 13,705.35 and 5,455.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,931.38 : 13,705.35 = 5,455.22 : x
2. Step 2: Convert to fraction form
   9,931.38/13,705.35 = 5,455.22/x
3. Step 3: Cross multiply
   9,931.38x = 13,705.35 × 5,455.22
4. Step 4: Simplify right side
   9,931.38x = 74,765,756.77
5. Step 5: Solve for x
   x = 74,765,756.77/9,931.38
6. Step 6: Final answer
   x = 7,528.23