Finding the Fourth Proportional to 9,971.61, 14,911.84 and 7,474.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,971.61 : 14,911.84 = 7,474.78 : x
2. Step 2: Convert to fraction form
   9,971.61/14,911.84 = 7,474.78/x
3. Step 3: Cross multiply
   9,971.61x = 14,911.84 × 7,474.78
4. Step 4: Simplify right side
   9,971.61x = 111,462,723.40
5. Step 5: Solve for x
   x = 111,462,723.40/9,971.61
6. Step 6: Final answer
   x = 11,178.01