Finding the Fourth Proportional to 9,883.27, 13,638.91 and 5,407.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,883.27 : 13,638.91 = 5,407.05 : x
2. Step 2: Convert to fraction form
   9,883.27/13,638.91 = 5,407.05/x
3. Step 3: Cross multiply
   9,883.27x = 13,638.91 × 5,407.05
4. Step 4: Simplify right side
   9,883.27x = 73,746,300.87
5. Step 5: Solve for x
   x = 73,746,300.87/9,883.27
6. Step 6: Final answer
   x = 7,461.73