Finding the Fourth Proportional to 9,956.50, 13,739.69 and 5,418.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,956.50 : 13,739.69 = 5,418.98 : x
2. Step 2: Convert to fraction form
   9,956.50/13,739.69 = 5,418.98/x
3. Step 3: Cross multiply
   9,956.50x = 13,739.69 × 5,418.98
4. Step 4: Simplify right side
   9,956.50x = 74,455,153.21
5. Step 5: Solve for x
   x = 74,455,153.21/9,956.50
6. Step 6: Final answer
   x = 7,478.05