Finding the Fourth Proportional to 9,880.42, 13,635.06 and 5,404.08

Step by Step Solution

1. Step 1: Write the proportion equation
   9,880.42 : 13,635.06 = 5,404.08 : x
2. Step 2: Convert to fraction form
   9,880.42/13,635.06 = 5,404.08/x
3. Step 3: Cross multiply
   9,880.42x = 13,635.06 × 5,404.08
4. Step 4: Simplify right side
   9,880.42x = 73,684,955.04
5. Step 5: Solve for x
   x = 73,684,955.04/9,880.42
6. Step 6: Final answer
   x = 7,457.67